@KevinDuguay
Do you think it could possibly be an authentication error for the private server? My other guess would be for it to be that you’re missing another DLL, so the server doesn’t know how to fully communicate with Steam. Do you have the crash handler in there as well?
Other than that, I can’t particularly say I know anything further than that, other than maybe a rebuild of your server files. I found a user that had a travel client problem with 4.27:
I’ll try to re-create your issue though, and see if it gives me any more insight.
I hope this can help,
-Zen 