Adding 'teachername' element to site template causes exception

[mdjnelson]

The following exception occurs when you attempt to add a 'teachername' element to a site template.

Coding error detected, it must be fixed by a programmer: Context does not belong to any course.

Stack trace:

    line 5522 of /lib/accesslib.php: coding_exception thrown
    line 1424 of /lib/enrollib.php: call to context->get_course_context()
    line 1341 of /lib/enrollib.php: call to get_enrolled_join()
    line 1392 of /lib/enrollib.php: call to get_enrolled_with_capabilities_join()
    line 1515 of /lib/enrollib.php: call to get_enrolled_sql()
    line 109 of /mod/customcert/element/teachername/classes/element.php: call to get_enrolled_users()
    line 45 of /mod/customcert/element/teachername/classes/element.php: call to customcertelement_teachername\element->get_list_of_teachers()
    line 67 of /mod/customcert/classes/edit_element_form.php: call to customcertelement_teachername\element->render_form_elements()
    line 204 of /lib/formslib.php: call to mod_customcert\edit_element_form->definition()
    line 79 of /mod/customcert/edit_element.php: call to moodleform->__construct()

[mdjnelson]

Done.