There may be hundreds of references on Google related to people who have had trouble getting CKEditor to work properly, particularly in relation to getting the link button to actually show the link dialog box. I note that the link button works on the editor on this forum - but what editor does it use?
Anyway back to my problem - most references refer to problems with z-index values meaning the link dialog opens behind something else or to modal problems that may require changes to js (somewhere).
Has anyone else had these difficulties and found a solution - several of the css solutions have not worked for me so far. Please remember my experience with Backdrop is less than 4 weeks in total.