Have you followed the following guidance?
There’s still ways to launch VRChat into offline mode or remove the content cache manually, by the way:
There is or was a known long-time issue with AT&T connectivity recently, if that applies to you.
Are you able to launch VRChat from any of the following launch URLs?
- VRChat Home - Launch Instance (US West) - Public
- VRChat Home - Launch Instance (US East) - Public
- VRChat Home - Launch Instance (Europe) - Public
- VRChat Home - Launch Instance (Japan) - Public
The output logs with logging level set to “Full” may give you a clue too.