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.
Yup!! I just tested enabling "Allow HTML in Colorbox captions" and that effectively kills the link icon.
If you disable that, the icon should open normally.
What to do: create an issue in Colorbox. It's clearly a bug there (malformed HTML snippet inserted). Good luck.
You may also want to include the Javascript error that this generates:
This indicates a malformed html tag being inserted by the ajax response into the DOM.
Uncaught SyntaxError: Unexpected token '<' at eval (<anonymous>) at jquery.js?v=1.12.4:2:2651 at Function.globalEval (jquery.js?v=1.12.4:2:2662) at text script (jquery.js?v=1.12.4:4:27423) at Xb (jquery.js?v=1.12.4:4:18945) at y (jquery.js?v=1.12.4:4:22407) at c (jquery.js?v=1.12.4:4:26927) at Object.send (jquery.js?v=1.12.4:4:27033) at Function.ajax (jquery.js?v=1.12.4:4:22182) at n._evalUrl (jquery.js?v=1.12.4:4:23293)