Update on this…I’ve unticked the ‘retargeting’ options i.e. once shown don’t show again for…. and once clicked don’t show again for…. and the pop-up has started working again on Safari only. Odd as I haven’t accessed the site for some time and I had both of those retargeting options set to ‘current session’ and I hadn’t browsed to that site recently.
So, am still having issues on Chrome and Firefox which both display the console error I provided earlier.
All resolved – was a JS minify issue.