When a teacher/manager (not a site administrator) uses the Moodle "log in as" functionality to impersonate a student mod hvp activities do not appear. This is because the ajax call (http://moodle.local/mod/hvp/proxy_pluginfile.php/1/mod_hvp/cachedassets/4110b59c8092d59fd5d23b7ffc267b301637797d5.js for example) returns file not found.

This is because this capability check is failing: https://github.com/h5p/moodle-mod_hvp/blob/stable/lib.php#L268

It is failing because the non admin users is "logged in as" a student in the course context, and the context provided to the capability check is the top level system context.

This in then causing this to fail: https://github.com/moodle/moodle/blob/master/lib/accesslib.php#L528

However, as:

$options['cacheability'] = 'public';
$options['immutable'] = true;

is set, the problematic capability check can be removed.
Removing it fixes this issue

Notes:

• This behaviour does not appear for site admins
• This behaviour does not appear when swithcing to the student role