There are no links to create a group and admin console

[Shevchik (Vitaly)]

@Shevchik

Solved the problem by removing the nginx configuration on the server where mattermost is installed.

But there was another problem:

• mattermost app for OS Adnroid and iOS cannot connect to server Mattermost.
  There are no problems in Windows OS and app for windows.

Are there any ideas?

ssl certificate is used correct / commercial