Admin lost access edit permissions

Server Setup Information

  • Rocket chat version: 2.1.1
  • Operating System: Debian 9
  • Deployment Method:
  • Number of Running Instances: 1
  • DB Replicaset Oplog:
  • NodeJS Version: v8.11.4
  • MongoDB Version: V.4.0.13
  • Proxy: no
  • Firewalls involved: no

Hello

I was in server administration and I lost access to these permissions. When I click on permissions, I have a blank page and when I go on a member to put it administrator, it tells me that I do not have permission to modify.
I tried this, but nothing to do and it was casually sure that it was not going to restore the permissions.

How could I redo my admin access to permissions? Thank you for your help.