Thank you for contacting us and I'd be happy to assist.
From the source code, it seems some of the map resources are being loaded through a different domain ( hidden link ) than the page itself ( hidden link ).
Was this website migrated/transferred from a different domain? If it was, can you please share exactly how it was done?
It would also be a good idea to clear all involved caches and test the map again with all extra ( non-Toolset ) plugins disabled, temporarily.
In case the issue still persists, you're welcome to share temporary admin login details for further troubleshooting.
Note: Your next reply will be private and though no changes will be made on your website, please make a complete backup copy, before sharing the access details.
Well spotted! Yes, the site I'm working on is a copy of the live site. I created it using the Updraft plugin. I'll see if I can fix the link and come back to you if that doesn't resolve the issue.
I've had a go at making another copy of the site I'm troubleshooting using a different method, but the map skins are still pointing at the original domain: hidden link