Admin user can t create group

Nextcloud version 15.0.8

Ubuntu 16.04.6 LTS
Release: 16.04
Codename: xenial
php7.0-cli

When creating a user, and a group, I make that user groupadmin for that group.
Login as that user, I can t create a new group, I get the message that:

An error occured during the request. Unable to proceed.
Logged in user must be an admin”. Why is this?

Is this the first time you’ve seen this error? (Y/N):

The output of your Nextcloud log in Admin > Logging:

Error	lib	ResourceLocator can not find a web root (root: /var/snap/nextcloud/13453/nextcloud/extra-apps/spreed, file: index.php/css/spreed/1831-5ade-merged-files.css?v=2965fc4cd3d14ce9023a7ac92b74f9c0, webRoot: , throw: true)	
2019-06-07T13:12:10+0200
Error	lib	ResourceLocator can not find a web root (root: /var/snap/nextcloud/13453/nextcloud/extra-apps/spreed, file: index.php/css/spreed/1831-5ade-merged-files.css?v=2965fc4cd3d14ce9023a7ac92b74f9c0, webRoot: , throw: true)	
2019-06-07T13:07:21+0200
Error	lib	ResourceLocator can not find a web root (root: /var/snap/nextcloud/13453/nextcloud/extra-apps/spreed, file: index.php/css/spreed/1831-5ade-merged-files.css?v=2965fc4cd3d14ce9023a7ac92b74f9c0, webRoot: , throw: true)	
2019-06-07T12:06:40+0200
Error	lib	ResourceLocator can not find a web root (root: /var/snap/nextcloud/13453/nextcloud/extra-apps/spreed, file: index.php/css/spreed/1831-5ade-merged-files.css?v=2965fc4cd3d14ce9023a7ac92b74f9c0, webRoot: , throw: true)

The output of your config.php file in /path/to/nextcloud (make sure you remove any identifiable information!):


The output of your Apache/nginx/system log in /var/log/____:

Cant find that file

I would expect exactly the described behavior. A group admin can only administer an existing group but not to create a new group as described here.

I m almost sure I could create Groups in RC12 signed in as group admin.

This is what I read following the link in your reply:

“Group admins are granted administrative privileges on specific groups, and can add and remove users from their groups.”

Does that mean the super admin has to create these groups at forehand?

That’s how I understand the role of a group admin, he administers an existing group.