Did you manage to fix the problem?
The same thing happens to me but in reverse.
I can invite a friend.
But when my friend accepts the invitation nothing happens.
And the same warning message that you have appears.
Thank you so much!!
Something similar happens with the SDK
My friend accepts the invitation and nothing happens.
I can only see him in “Matchmaking” when I press the “register” button…
[2023.01.18-14.39.20:385][383]LogEOSSDK: Warning: LogEOSAuth: GetAsIntegratedPlatformAccountId - ExternalAccountType not set. TargetPlatform(None)
[2023.01.18-14.40.44:619][437]LogEOSSDK: LogEOSUI: Social Overlay: HandleAcceptGameInviteIntent