EOS errors when opening project in UE 5.3 even though I don't use EOS

Development Getting Started & Setup
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1

Whenever I open my UE 5.3 project I get the following errors/warnings in log:

LogEOSSDK: Warning: LogEOSAuth: No existing persistent auth credentials were found for automatic login.
LogFab: Error: Login failed - error code: EOS_InvalidAuth
LogEOSSDK: Error: LogEOSAuth: Invalid parameter EOS_Auth_Credentials.Token reason: must not be null or empty
LogFab: Error: Login failed - error code: EOS_InvalidParameters

This only started happening around the switch from Marketplace to Fab, so not sure if itā€™s a bug or something I need to configure in the project to suppress. I donā€™t use EOS in this project. I did notice a plugin ā€œEOS Sharedā€ is enabled but I canā€™t disable it because it says that plugin is required by Fab. How can I fix these errors/warnings?

1 Like
2

Potentially the same issue as Irremovable LogEOS error in every UE5.5 project.

3

Hello @Leroyyyy231
This could help you:

4

Thanks for the reply but thatā€™s unrelated. Iā€™m able to do everything fine, itā€™s a benign error/warning. Just would be nice to suppress so I can spot real warnings/errors better.

5

i have same problem. epic should make good engines not bug related ā– ā– ā– ā– 

6

I have the same problem all the time.

7

Do you use any type of firewall or something of that nature? I had to disable a VPN once with this issue as well. It went away when I bypassed the VPN.

8

Iā€™ve never used a VPN but the problem persists.

9

Does this only happen in 5.3? (Not other versions?)

10

5.5.3

11

Gotcha. Have you tried removing your ā€˜Savedā€™ and ā€˜Intermediateā€™ folders and testing, by chance? If not, give that a shot.

12

Iā€™m working with Unreal Engine 5.4, and I keep getting the following error when trying to build my project:

LogFab: Error: Login failed - error code: EOS_InvalidAuth
LogEOSSDK: Error: LogEOSAuth: Invalid parameter EOS_Auth_Credentials.Token reason: must not be null or empty
LogFab: Error: Login failed - error code: EOS_InvalidParameters
LogEOSSDK: Error: LogEOS: EOS_Auth_CopyUserAuthToken - One or more parameters are null
LogFab: Error: User auth token is invalid - unable to get auth token
PackagingResults: Error: Unknown Error

Iā€™m NOT using Epic Online Services (EOS) in my project, so I tried disabling it in DefaultEngine.ini and DefaultGame.ini by adding the following lines:

[OnlineSubsystem]
DefaultPlatformService=None

[OnlineSubsystemEOS]
bEnabled=false

Even uninn

However, the error still persists when building the project.
I also deleted the Saved and Intermediate folders and tried again, but the problem remains.

Things I have already tried:

Disabling EOS in .ini files
Deleting Saved and Intermediate folders
Checking Project Settings > Plugins and ensuring EOS is disabled
Uninstalling the EOS plugin entirely
Searching for EOS references in Blueprints (found none)

Does anyone know what else I can try? Any help would be greatly appreciated!

Thanks in advance!

13

You could try disabling the Fab plugin, but then you might have issues using assets from Fab if you use any.

Edit: Also disable EOS Shared plugin.

2 Likes
14

I was considering that as well. Good call.

15

Iā€™m having the same errors and tried this, which got rid of the errors but then as you predicted it then couldnā€™t find the Fab assets in our project. So close! Have you got any advice for me please?

16

Not a great answer I realize, but you could report a bug to Unreal Engine: https://www.unrealengine.com/en-US/support/report-a-bug