Failure to grant permissions

**1. I have been unable to grant any form of permissions on the ODK,I cannot add people,delete, update permissions for users and even users who previously could add submissions keep getting error messages
ODK Collect

3. Updating the forms, refreshing my page?

4. Provide information on how I can solve this, we have over 700 people using the tool presently?


What server are you using to host the data? ODK Aggregate? ODK Central? Something else?