Show/Hide editor is not working in static blocks. I am getting following Errors in the console -
Refused to execute script from https://www.example.com/admin/cms/block/edit/block_id/20/key/f3ee116b456375338c3747b3ab97692ba62457613c332ab989c7d8431ce2841f//plugins/style/editor_plugin.js
because its MIME type ('text/html') is not executable, and strict MIME type checking is enabled.