My maps on this dev site: https://devhps.site/local-groups/
Only appear the second time you view the page. Try loading that page and see if there are any markers, then refresh the page.
I’ve deactivated ALL the plugins - still can’t get the markers to appear.
Here’s the JS console: https://share.cleanshot.com/F95jsc26
And yes I did disable ALL the plugins. I’m going to switch on Wordfence, but that’s all.
Bill.