STEPS TO REPRODUCE
- Go to a page with some text content
- Select a word
- Press CTRL+M
- Insert some text
- Click 'Add annotation'
- Click on the small yellow icon of the added annotation
- Click the pencil - 'Edit annotation'
The annotation is opened in CKEditor edit mode.
When click 'Edit annotation', CKEditor is not loaded. Instead, some HTML code is displayed (partially from what it seems) on the annotation box (see Cannot_edit_annotation_CKEditor.png):
If clicked on the annotation box, the HTML code is replaced by a spinning wheel (see Cannot_edit_annotation_CKEditor2)
If clicked 'Update', the full HTML code is saved as a comment.