I use the last update of the TinyMce plugin and I have a problem with the € key. Nothing happens when I want to insert this € symbol [with ctrl + alt + e].
I read the doc but I dont know what to edit for make it works...
With TinyMce you can "insert special character" with a plugin
It is in the TinyMce documentation :
"This plugin adds a charmap toolbar button that enables users to insert special characters into their text. It also adds the menu item Special character under the Insert menu."
https://www.tinymce.com/docs/plugins/charmap/
Hope this helps