mod_mediasite could not determine if the user has the 'mod/mediasite:mymediasite' due to the following exception: 检测到源代码错误，必须由程序员修复：Attempt to get the course category for this page before the course was set.

• line 133 of /mod/mediasite/locallib.php: call to debugging()
• line 88 of /mod/mediasite/navigation.php: call to mediasite_has_capability_in_any_context()
• line 36 of /local/mediasite_courses/lib.php: call to mediasite_navigation_extension_mymediasite_placement()
• line 1527 of /lib/navigationlib.php: call to local_mediasite_courses_extend_navigation()
• line 1490 of /lib/navigationlib.php: call to global_navigation->load_local_plugin_navigation()
• line 3037 of /lib/navigationlib.php: call to global_navigation->initialise()
• line 83 of /tag/index.php: call to global_navigation->find()