OU search /admin/tool/dataprivacy/pluginregistry.php Userlist provider missing

[DR-Bi]

Similar to Enrol_groupsync /admin/tool/dataprivacy/pluginregistry.php Userlist provider missing on Moodle Tracker, OU search plugin comes up with 'Userlist provider missing'.

To recur:
Go to Dashboard / Site administration / Users / Privacy and policies / Plugin privacy registry
Open 'Local plugin' and find 'OU search'

Expectation:
No icons except 'Additional', whose icon text is "An additional plugin installed on this site."

Result:
Both 'Additional' and 'Userlist provider missing' appear. The icon test for the latter is "This plugin has the base provider but should also implement the userlist provider for full support of privacy functionality."