Hey there @mansyrevam! Welcome to the community!
From these two errors specifically it seems like there’s an issue with your login token.
LogEOSSDK: Error: LogEOS: EOS_Auth_CopyUserAuthToken - One or more parameters are null
LogFab: Error: User auth token is invalid - unable to get auth token
This could stem from an aggressive antivirus or firewall attempting to block the connection, a malformed token request, or some kind of cached data. Logging out and back in usually solves this if it’s not the cache or the network restrictions, however if it doesn’t you may need to make exceptions in your security software for Unreal.
The other error gives detail about what failed but it’s likely not the only thing, just the first one causing it to fail out:
LogEOSSDK: Warning: ... HttpStatus=[403], ErrorCode=[errors.com.epicgames.common.insufficient_scopes], ErrorMessage=[Insufficient access scopes. Expected: [friends_list]]
This is saying the request is wrong in some way, specifically that it expected to have requested the friends_list.