Howard Miller

I'm not sure if this helps but you should understand that 'enrolment' and 'role assignment' are two entirely different things. You don't notice because course 'enrolment' normally takes care of this.

Anyway, the point is that you can legitimately have a role assignment *without* being enrolled in a course.

You are missing the PHP 'mbstring' extension.

In the course click Participants and the change the dropdown at the top left to 'Check permissions.

Pick a teacher user and filter for the capability 'moodle/grade:view'. This should NOT be enabled for the teacher role. If it is, they are either enrolled into the wrong role, this capability has been enabled for the teacher role, permissions have been overriden in the course, or something else (but still a role issue).

The error message is actually telling you that you have an invalid SSL Certificate. The only other tiny possibility is that your computer or server are set to the wrong time and date (unlikely).

In my experience, if you have an error that says your site has an invalid certificate then it's almost certainly true.

 

As a workaround, you may want to investigate chrome://flags/#allow-insecure-localhost

You need to speak to whoever runs your Moodle site.

This is where Moodle use and development is discussed. It's not the Moodle site where your course lives.