I have a custom plugin that works in Plone 5.1 but breaks in 5.1.2. I believe you updated the version of tinymce between these releases. I don’t think it’s a problem with my plugin.js - even if that is blank, tinymce fails to render at all if I have any value in the custom_plugins section.
The error message varies by browser and might be related to https://github.com/tinymce/tinymce/issues/3670
- Firefox: TypeError: editor.getDoc(…) is null
- Google Chrome: Uncaught TypeError: Cannot read property ‘documentElement’ of null
Has anyone been able to use a custom plugin in 5.1.2 at all? And if so, did you have to change the config on the Plone side?