Insert link / hyperlink not working

Have you tried:

– deactivating all plugins to see if this resolves the problem. If this works, re-activate the plugins one by one until you find the problematic plugin(s).

– switching to the Twenty Eleven theme to rule out any theme-specific problems.

– resetting the plugins folder by FTP or PhpMyAdmin. Sometimes, an apparently inactive plugin can still cause problems.

– re-uploading the wp-admin and wp-includes folders from a fresh download of WordPress.

Thank you for your reply. I have done all of the things listed except switching the theme because I fear losing the custom theme that I use. Is there any danger of that?

I just tried installing Twenty Eleven and it does not seem to be logging in using my ftp info (which is what happens when I try to update plug-ins as well).

Upload the theme’s folder to wp-content/themes using FTP.

I activated twenty eleven theme and still cannot insert hyperlinks.

Have you tried using another web browser? Another computer?

Yes. Firefox and Chrome. Two different macs.

Site url?

homegrown.org
I have reactivated my custom theme.

That’s not a WordPress site.

Sorry, this is the link to the WordPress site
https://homegrown.org/blog/

Deactivate all plugins & switch to the Twenty Eleven theme, please.

Done.

Now can you create a new post and try to add a single link to it?

Now I’m getting the old problem before I deactivated all plug-ins. I add text, click the chain to add a link, enter a url and I get:
Are you sure?
This page is asking you to confirm that you want to leave – data you have entered may not be saved.