Error when using plugin with CAPquiz

[Famondir]

I just tried out your plugin. And it works quite well. However I became an error when I tried to restrict the access of a CAPquiz activity with your plugin:

Exception - Call to a member function is_question_valid() on null

More information about this error

Link to error image

I paid the credits but can't access the activity as a Student or in Student role. But I still can edit the activity as administrator.

With standard quizzes and h5p content it just works fine.