Finally, after a grueling week of troubleshooting, John discovered the root cause of the issue: a misconfigured cache setting that was causing the game to attempt to load too many resources into memory at once. With the setting corrected, the game began to perform smoothly, loading times decreased dramatically, and the team breathed a collective sigh of relief.
If you see the error instantly (within 2 seconds of the blue bar finishing), the server is rejecting your existing files. Open the console ( ~ ) and type: