OK. Call it resolved. It was a plugin conflict with a plugin I don’t need.
Thanks.
Now, none of the Add Link buttons are working although they were before. Here’s the info at the F12 key:
JQMIGRATE: Migrate is installed, version 1.4.1 sidekick_admin.js:156 setup_buttons_activate util.js:211 Google Maps API warning: NoApiKeys https://developers.google.com/maps/documentation/javascript/error-messages#no-api-keysZA.j @ util.js:211