I have a custom filter plugin that I've used from Moodle 3.1 where we recently upgraded to 3.10. The plugin works fine - everywhere the text is supposed to be replaced, it's working and doing so correctly. However, in my plugin management screen, it says "Plugin Missing From Disk" and my admin options are gone. Any ideas on how to fix it?
Has there been a change for the required files for filter plugins between 3.1 and 3.10? It might be the plugin will need updating.