# \#onlinesubsystem **URL:** https://forums.unrealengine.com/tag/onlinesubsystem/2563.md [Latest](https://forums.unrealengine.com/latest.md) · [Categories](https://forums.unrealengine.com/categories.md) · [Tags](https://forums.unrealengine.com/tags.md) --- ## [Steam Online Subsystem Not Working For Me](https://forums.unrealengine.com/t/steam-online-subsystem-not-working-for-me/2823747)
**Author:** [@abstreebee](https://forums.unrealengine.com/u/abstreebee)\ **Replies:** 4\ **Last updated:** [September 19, 2026, 9:22pm UTC](https://forums.unrealengine.com/t/steam-online-subsystem-not-working-for-me/2823747 "2026-09-19T21:22:04Z")
Hey y’all. Dragging my head back to the forums to get some help again haha. So I recently tried following this tutorial: https://www.youtube.com/watch?v=PVDzjOV2wUg and when trying to do the OSS setup it just didn’t wor… --- ## [Does logging into EOS with DeviceID actually work?](https://forums.unrealengine.com/t/does-logging-into-eos-with-deviceid-actually-work/2675889)
**Author:** [@eikzilla](https://forums.unrealengine.com/u/eikzilla)\ **Replies:** 8\ **Last updated:** [September 15, 2026, 1:27pm UTC](https://forums.unrealengine.com/t/does-logging-into-eos-with-deviceid-actually-work/2675889 "2026-09-15T13:27:53Z")
I’m trying to use EOS to test my game with friends to play over the Internet. I have all the gameplay working fine via ListenServer, so I wrote some code to create and join sessions using EOS. The documentation claims t… --- ## [UE 5.5 Steam Multiplayer: OSS Steam vs Advanced Sessions vs SteamCore?](https://forums.unrealengine.com/t/ue-5-5-steam-multiplayer-oss-steam-vs-advanced-sessions-vs-steamcore/2725731)
**Author:** [@krisz\_0325](https://forums.unrealengine.com/u/krisz_0325)\ **Replies:** 2\ **Last updated:** [September 9, 2026, 3:06pm UTC](https://forums.unrealengine.com/t/ue-5-5-steam-multiplayer-oss-steam-vs-advanced-sessions-vs-steamcore/2725731 "2026-09-09T15:06:50Z")
I’m developing a Steam-only 5v5 FPS in UE5 and planning to use a host migration plugin. I’m trying to decide between: UE 5.5 + OSS Steam UE 5.5 + SteamCore UE 5.4 + Advanced Sessions My priorities are: St… --- ## [Cant connect to created session in my Demo version loaded on Steam](https://forums.unrealengine.com/t/cant-connect-to-created-session-in-my-demo-version-loaded-on-steam/2731513)
**Author:** [@Skyapach](https://forums.unrealengine.com/u/Skyapach)\ **Replies:** 0\ **Last updated:** [June 25, 2026, 11:14pm UTC](https://forums.unrealengine.com/t/cant-connect-to-created-session-in-my-demo-version-loaded-on-steam/2731513 "2026-06-25T23:14:39Z")
So, in redactor and in builded game (in folder) multiplayer work. But in Demo loaded on Steam this doesnt work. From debug messages i know that count of found sessions is 0. Friends invite doesnt work too (secon… --- ## [Create Session doesn't work on Android even using OSS GooglePlay](https://forums.unrealengine.com/t/create-session-doesnt-work-on-android-even-using-oss-googleplay/658288)
**Author:** [@Chimera\_QQ](https://forums.unrealengine.com/u/Chimera_QQ)\ **Replies:** 7\ **Last updated:** [June 20, 2026, 3:06pm UTC](https://forums.unrealengine.com/t/create-session-doesnt-work-on-android-even-using-oss-googleplay/658288 "2026-06-20T15:06:29Z")
Hello guys, I am doing a P2P mobile game and was using OSS EOS, before an official EOS dev told me that it is not yet supported. Therefore, I switched to OSS GooglePlay (I was wondering though, was is the difference be… --- ## [UE5.7 Online Subsystem Steam can't find sessions ](https://forums.unrealengine.com/t/ue5-7-online-subsystem-steam-cant-find-sessions/2676620)
**Author:** [@1210451061](https://forums.unrealengine.com/u/1210451061)\ **Replies:** 9\ **Last updated:** [May 5, 2026, 5:31pm UTC](https://forums.unrealengine.com/t/ue5-7-online-subsystem-steam-cant-find-sessions/2676620 "2026-05-05T17:31:14Z")
\[/Script/Engine.GameEngine\] !NetDriverDefinitions=ClearArray +NetDriverDefinitions=(DefName=“GameNetDriver”,DriverClassName=“/Script/SteamSockets.SteamSocketsNetDriver”,DriverClassNameFallback=“OnlineSubsystemUtils.IpNet… --- ## [Unable to Join Sessions in Packaged Game (Works in Editor) with Steam Advanced Sessions Online Subsystem](https://forums.unrealengine.com/t/unable-to-join-sessions-in-packaged-game-works-in-editor-with-steam-advanced-sessions-online-subsystem/2227830)
**Author:** [@Hafeelahmed](https://forums.unrealengine.com/u/Hafeelahmed)\ **Replies:** 19\ **Last updated:** [April 19, 2026, 12:50pm UTC](https://forums.unrealengine.com/t/unable-to-join-sessions-in-packaged-game-works-in-editor-with-steam-advanced-sessions-online-subsystem/2227830 "2026-04-19T12:50:44Z")
Hello everyone, I’m new to Unreal Engine and multiplayer development, and I need some help troubleshooting an issue I’m facing in my project. I’m using the Steam Advanced Sessions Online Subsystem for multiplayer functi… --- ## [Steam Networking Without Relays Is Broken in UE5.6](https://forums.unrealengine.com/t/steam-networking-without-relays-is-broken-in-ue5-6/2683846)
**Author:** [@YousefBadrKK](https://forums.unrealengine.com/u/YousefBadrKK)\ **Replies:** 1\ **Last updated:** [March 31, 2026, 9:54pm UTC](https://forums.unrealengine.com/t/steam-networking-without-relays-is-broken-in-ue5-6/2683846 "2026-03-31T21:54:22Z")
I’m using UE5.6 with Steam Sockets net driver plugin and Advanced Steam Sessions. The client latency when connected without relays is 27ms in UE5.1 compared to 150ms when connected using steam’s best relay server using … --- ## [How to: One project that unlocks Achievements on Steam and/or Epic Games Store](https://forums.unrealengine.com/t/how-to-one-project-that-unlocks-achievements-on-steam-and-or-epic-games-store/2706985)
**Author:** [@JesseyCool](https://forums.unrealengine.com/u/JesseyCool)\ **Replies:** 2\ **Last updated:** [March 24, 2026, 8:32am UTC](https://forums.unrealengine.com/t/how-to-one-project-that-unlocks-achievements-on-steam-and-or-epic-games-store/2706985 "2026-03-24T08:32:40Z")
Hello, Unreal Engine 5.6 I did try using Epic Online Services Plus by following this video. But I do not see the same options that he has as Cross platform. Another plan I have is to: implement Epic Online Services as… --- ## [Why the Epic Online Service (EOS) OSS access token is not refreshed?](https://forums.unrealengine.com/t/why-the-epic-online-service-eos-oss-access-token-is-not-refreshed/1412083)
**Author:** [@AB\_Jonathan](https://forums.unrealengine.com/u/AB_Jonathan)\ **Replies:** 3\ **Last updated:** [February 17, 2026, 12:50am UTC](https://forums.unrealengine.com/t/why-the-epic-online-service-eos-oss-access-token-is-not-refreshed/1412083 "2026-02-17T00:50:38Z")
I found an occurence where the EOS OSS’ IdentityInterface does not return a correct access token (expired). I used (IdentityInterface-\>GetAuthToken(...)) to get the token. I created a scheduler run each minute to obtai… --- ## [Feature Request: Online Services (OSSv2) needs Friends + Parties (social layer) ](https://forums.unrealengine.com/t/feature-request-online-services-ossv2-needs-friends-parties-social-layer/2698855)
**Author:** [@meags27](https://forums.unrealengine.com/u/meags27)\ **Replies:** 0\ **Last updated:** [February 10, 2026, 6:21pm UTC](https://forums.unrealengine.com/t/feature-request-online-services-ossv2-needs-friends-parties-social-layer/2698855 "2026-02-10T18:21:54Z")
Hi! UE is clearly migrating toward the Online Services framework (OSS v2) (Auth + Sessions have moved), but a big blocker remains: Social/Friends and Parties aren’t there yet. I am not using EOS or Steam but a custom ba… --- ## [Can't create Steam Sessions (Steam Sockets)](https://forums.unrealengine.com/t/cant-create-steam-sessions-steam-sockets/485668)
**Author:** [@Honorenji](https://forums.unrealengine.com/u/Honorenji)\ **Replies:** 14\ **Last updated:** [February 8, 2026, 8:50pm UTC](https://forums.unrealengine.com/t/cant-create-steam-sessions-steam-sockets/485668 "2026-02-08T20:50:36Z")
Hello, I am creating a Multiplayer game which uses Steam. Now I already have a AppID and the game is available on Steam, but for some reason I am having issues when creating a session. This is the relevant part which … --- ## [Has anyone been able to get Online Subsystem Steam to work on a mac (Apple Silicon) in UE5.3.1?](https://forums.unrealengine.com/t/has-anyone-been-able-to-get-online-subsystem-steam-to-work-on-a-mac-apple-silicon-in-ue5-3-1/1353483)
**Author:** [@karlingen](https://forums.unrealengine.com/u/karlingen)\ **Replies:** 5\ **Last updated:** [January 27, 2026, 2:03am UTC](https://forums.unrealengine.com/t/has-anyone-been-able-to-get-online-subsystem-steam-to-work-on-a-mac-apple-silicon-in-ue5-3-1/1353483 "2026-01-27T02:03:29Z")
I’ve followed the steps in the official documentation to set it up: Online Subsystem Steam Interface in Unreal Engine | Unreal Engine 5.3 Documentation But no matter what I do, I keep getting this error in the log when … --- ## [Host session fails when only having 1 client ](https://forums.unrealengine.com/t/host-session-fails-when-only-having-1-client/2693912)
**Author:** [@mutlulukveren1](https://forums.unrealengine.com/u/mutlulukveren1)\ **Replies:** 1\ **Last updated:** [January 21, 2026, 5:24pm UTC](https://forums.unrealengine.com/t/host-session-fails-when-only-having-1-client/2693912 "2026-01-21T17:24:35Z")
When I test the game in the Editor using play as client (2 player) everything works perfectly. I can host, and the client can join. However, when I try to test it in play as client (1 player) mode (or packaged build), pr… --- ## [How can I load players into different instances of the same Level?](https://forums.unrealengine.com/t/how-can-i-load-players-into-different-instances-of-the-same-level/2688283)
**Author:** [@arts.x](https://forums.unrealengine.com/u/arts.x)\ **Replies:** 5\ **Last updated:** [January 18, 2026, 5:05pm UTC](https://forums.unrealengine.com/t/how-can-i-load-players-into-different-instances-of-the-same-level/2688283 "2026-01-18T17:05:36Z")
In my game, there’s a shop section which is basically a wall where they pick objects they want to purchase and I want to give every player it’s own wall. The best solution is loading every one in a different level where … --- ## [Clients are disconnecting during Server Travel](https://forums.unrealengine.com/t/clients-are-disconnecting-during-server-travel/2661481)
**Author:** [@Harjyot471](https://forums.unrealengine.com/u/Harjyot471)\ **Replies:** 3\ **Last updated:** [January 18, 2026, 12:03am UTC](https://forums.unrealengine.com/t/clients-are-disconnecting-during-server-travel/2661481 "2026-01-18T00:03:13Z")
Hi, I have had this issue for more than 2 years now and I can’t seem to fix it. It all works fine in editor but when testing with 2 different machines and steam accounts it breaks. Overview of issue: The issue is when … --- ## [Steam Online Subsystem not working in packaged build (UE5.6)](https://forums.unrealengine.com/t/steam-online-subsystem-not-working-in-packaged-build-ue5-6/2652620)
**Author:** [@KOHNSSER](https://forums.unrealengine.com/u/KOHNSSER)\ **Replies:** 4\ **Last updated:** [December 6, 2025, 11:48am UTC](https://forums.unrealengine.com/t/steam-online-subsystem-not-working-in-packaged-build-ue5-6/2652620 "2025-12-06T11:48:32Z")
I’m testing multiplayer with the Steam Online Subsystem in Unreal Engine 5.6. Everything works fine inside the editor, but when I run the packaged build, it doesn’t connect to Steam. In the logs I get these warnings: L… --- ## [Connecting to steam using Macbook ](https://forums.unrealengine.com/t/connecting-to-steam-using-macbook/2680799)
**Author:** [@\_Owl1](https://forums.unrealengine.com/u/_Owl1)\ **Replies:** 0\ **Last updated:** [December 1, 2025, 3:24pm UTC](https://forums.unrealengine.com/t/connecting-to-steam-using-macbook/2680799 "2025-12-01T15:24:11Z")
I am making an online multiplayer. I have steam installed and steamworks as a third party in my Unreal Engine 5.7. I am using Mac book pro M1 Pro. When I make a server that works but searching for the server never brings… --- ## [Authentication for steam and gamesparks via online subsystem](https://forums.unrealengine.com/t/authentication-for-steam-and-gamesparks-via-online-subsystem/462859)
**Author:** [@ShinyBlade777](https://forums.unrealengine.com/u/ShinyBlade777)\ **Replies:** 3\ **Last updated:** [November 25, 2025, 6:49pm UTC](https://forums.unrealengine.com/t/authentication-for-steam-and-gamesparks-via-online-subsystem/462859 "2025-11-25T18:49:33Z")
I’m having trouble authenticating my game on game sparks, I am using Unreal’s online subsystem to get an auth token from steam, but I need to convert it from FString to Hex for game sparks to accept it. Here’s what I hav… --- ## [How can I change VOIP's settings during Runtime?](https://forums.unrealengine.com/t/how-can-i-change-voips-settings-during-runtime/2656305)
**Author:** [@arts.x](https://forums.unrealengine.com/u/arts.x)\ **Replies:** 3\ **Last updated:** [October 17, 2025, 2:00am UTC](https://forums.unrealengine.com/t/how-can-i-change-voips-settings-during-runtime/2656305 "2025-10-17T02:00:55Z")
Hello, In UE4.27, I’m working on a multiplayer game based on the steam advanced sessions plugin and I’ve implemented proximity voice chat using VOIP(talker) and now I’m working on adding a walkie-talkie, but no matter h… --- ## [Unable to Join Session using EOS - Error SE\_HOST\_NOT\_FOUND \[11001\]](https://forums.unrealengine.com/t/unable-to-join-session-using-eos-error-se-host-not-found-11001/2072791)
**Author:** [@FabioIGF](https://forums.unrealengine.com/u/FabioIGF)\ **Replies:** 3\ **Last updated:** [September 30, 2025, 12:24am UTC](https://forums.unrealengine.com/t/unable-to-join-session-using-eos-error-se-host-not-found-11001/2072791 "2025-09-30T00:24:52Z")
I’m currently trying to get a multiplayer session working correctly. I’ve created a plugin that handles matchmaking using Unreal’s Online Subsystem. When I set my DefaultEngine.ini to work with Steam services, everything… --- ## [Online subsystem dedicated server NAT traversal](https://forums.unrealengine.com/t/online-subsystem-dedicated-server-nat-traversal/2640552)
**Author:** [@ziggizaggy1](https://forums.unrealengine.com/u/ziggizaggy1)\ **Replies:** 8\ **Last updated:** [August 17, 2025, 8:40pm UTC](https://forums.unrealengine.com/t/online-subsystem-dedicated-server-nat-traversal/2640552 "2025-08-17T20:40:23Z")
Hello, I am trying to figure out how to make my idea work with the help of the online subsystem. The idea is as follows: A player hosts a game by starting an instance of an unreal engine dedicated server that runs loca… --- ## [Join Session Failing with "Unknown Error" or "Joining Failed" (EOS)](https://forums.unrealengine.com/t/join-session-failing-with-unknown-error-or-joining-failed-eos/2629744)
**Author:** [@GryffDavid](https://forums.unrealengine.com/u/GryffDavid)\ **Replies:** 1\ **Last updated:** [August 8, 2025, 5:39am UTC](https://forums.unrealengine.com/t/join-session-failing-with-unknown-error-or-joining-failed-eos/2629744 "2025-08-08T05:39:12Z")
Hi, I’m having some trouble getting Join Session to work properly. I’m able to log in to EOS using the DevAuthTool and I’m able to create and host the session. I’m even able to get a list of available sessions. But when… --- ## [How to set up rich presence for EOS? ](https://forums.unrealengine.com/t/how-to-set-up-rich-presence-for-eos/2633533)
**Author:** [@ChisomoMbeza](https://forums.unrealengine.com/u/ChisomoMbeza)\ **Replies:** 0\ **Last updated:** [August 7, 2025, 2:42pm UTC](https://forums.unrealengine.com/t/how-to-set-up-rich-presence-for-eos/2633533 "2025-08-07T14:42:35Z")
I managed to set up rich presence for GDK and Steam using the online subsystem as detailed here: Online Subsystem Presence Interface in Unreal Engine | Unreal Engine 5.5 Documentation | Epic Developer Community but that … --- ## [C++ Read Steam Leaderboard - How to?](https://forums.unrealengine.com/t/c-read-steam-leaderboard-how-to/383677)
**Author:** [@MeMe](https://forums.unrealengine.com/u/MeMe)\ **Replies:** 4\ **Last updated:** [August 3, 2025, 4:45pm UTC](https://forums.unrealengine.com/t/c-read-steam-leaderboard-how-to/383677 "2025-08-03T16:45:24Z")
Hi folks, I have the Steam Overlay running and I am able to write and read Steam Leaderboards stats. Tested with my project uploaded to Steam. So I guess everything is set up correctly. What I have done so far: set … --- ## [HELP online subsysteme Unable to create OnlineSubsystem instance Steam](https://forums.unrealengine.com/t/help-online-subsysteme-unable-to-create-onlinesubsystem-instance-steam/2612997)
**Author:** [@kivikovich](https://forums.unrealengine.com/u/kivikovich)\ **Replies:** 0\ **Last updated:** [July 21, 2025, 1:27pm UTC](https://forums.unrealengine.com/t/help-online-subsysteme-unable-to-create-onlinesubsystem-instance-steam/2612997 "2025-07-21T13:27:23Z")
going crazy , spent 15 hours trying to figure it out , everything works , steamworks and everything , even got my steam page , but the achievements wont work , it always returns failed on cache achievements , and in my l… --- ## [Unable to create session in packaged game (Works in Editor) with Steam Advanced Sessions Online Subsystem ](https://forums.unrealengine.com/t/unable-to-create-session-in-packaged-game-works-in-editor-with-steam-advanced-sessions-online-subsystem/2604413)
**Author:** [@G4C4](https://forums.unrealengine.com/u/G4C4)\ **Replies:** 6\ **Last updated:** [July 16, 2025, 10:49am UTC](https://forums.unrealengine.com/t/unable-to-create-session-in-packaged-game-works-in-editor-with-steam-advanced-sessions-online-subsystem/2604413 "2025-07-16T10:49:58Z")
Hi, I tested my multiplayer game in editor for creating and joining sessions which works perfectly fine but fails in the packaged game. I was initially able to create sessions but couldnt join session in the packaged gam… --- ## [How to implement VOIP from 1 source to 3 locations on a level?](https://forums.unrealengine.com/t/how-to-implement-voip-from-1-source-to-3-locations-on-a-level/2517769)
**Author:** [@evrenbus](https://forums.unrealengine.com/u/evrenbus)\ **Replies:** 1\ **Last updated:** [July 11, 2025, 1:24pm UTC](https://forums.unrealengine.com/t/how-to-implement-voip-from-1-source-to-3-locations-on-a-level/2517769 "2025-07-11T13:24:48Z")
Hello everyone I have been searching for a week now, decided to ask here. I am trying to make a voice chat, there are 4 stations on the map and there are 4 players in the game. I want them to be able to talk to each oth… --- ## [error LNK2019: unresolved external symbol for FOnlineSessionSettings::Get\(class FName,class FName &) ](https://forums.unrealengine.com/t/error-lnk2019-unresolved-external-symbol-for-fonlinesessionsettings-get-class-fname-class-fname-class-fname/2584666)
**Author:** [@MeSmartPepega](https://forums.unrealengine.com/u/MeSmartPepega)\ **Replies:** 2\ **Last updated:** [June 30, 2025, 4:39pm UTC](https://forums.unrealengine.com/t/error-lnk2019-unresolved-external-symbol-for-fonlinesessionsettings-get-class-fname-class-fname-class-fname/2584666 "2025-06-30T16:39:03Z")
Hi everyone, i am actually starting to lose my mind after trying to fix this for the whole day :slight\_smile: I get following error messages when trying to compile my code: FLobbyData.cpp.obj : error LNK2019: unresolv… --- ## [The macro "SEARCH\_PRESENCE" cannot be resolved](https://forums.unrealengine.com/t/the-macro-search-presence-cannot-be-resolved/1341978)
**Author:** [@MacroLemonXD](https://forums.unrealengine.com/u/MacroLemonXD)\ **Replies:** 6\ **Last updated:** [June 29, 2025, 9:48am UTC](https://forums.unrealengine.com/t/the-macro-search-presence-cannot-be-resolved/1341978 "2025-06-29T09:48:21Z")
So I’m now making a simple game in order to learn online-subsystem, but now I’m stuck at this point: Rider (I use Rider instead of VS as my IDE) said “cannot resolve symbol SEARCH\_PRESENCE”, restarting Rider IDE or Unr… [Next page](https://forums.unrealengine.com/tag/onlinesubsystem/2563.md?match_all_tags=true&page=1&tags%5B%5D=onlinesubsystem)