Hello,
jmail plugin is not compatible with Moodle 3.4 and above I think. I have upgraded my Moodle from 3.3.9+ to Moodle 3.4.8 (Build: 20190311) and plugin stop working.
I get en error
Uncaught TypeError: Cannot read property 'addEventListener' of null
at Object.M.editor_tinymce.init_editor (module.js:5) (.../lib/editor/tinymce/module.js)
at mailbox.php?id=134:452 (.../blocks/jmail/mailbox.php?id=xxx)
Any suggestions are nice.
Regards