So how can we make sure the data quality is good?

Can not execute event observer '\plugintype_pluginname\event\observer\course_module_created::store'

line 164 of /lib/classes/event/manager.php: call to debugging()
line 75 of /lib/classes/event/manager.php: call to core\event\manager::process_buffers()
line 795 of /lib/classes/event/base.php: call to core\event\manager::dispatch()
line 287 of /mod/hvp/classes/view_assets.php: call to core\event\base->trigger()
line 255 of /mod/hvp/classes/view_assets.php: call to mod_hvp\view_assets->triggermoduleviewedevent()
line 55 of /mod/hvp/view.php: call to mod_hvp\view_assets->logviewed()