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!