When I select a project I created or someone shared with me, I get several Errors.

The Dashboard doesn't load. Individual tasks say they're removed or deleted, when they're not. Gantt, Documents, Timesheet, Issues, and Forums gives this error:

Ouch ! Permission Denied

My admin has verified I have access. I have tried different browsers, different computer, different internet connections, I've cleared my cache. This is happening across all projects. This started today. Yesterday and last week I didn't have any issues.