There are thousands of themes from WordPress and we try to adjust by creating different styles, we have not had any reports about that particular theme or we would
If you were not able to register in the SLP home forum yesterday, the server was being updated maintained, so not sure if that may have been the same time and caused a glitch. We ask to post in the forums under this support page there is info, because we do not monitor this WP SLP forum as often. We only get a question here once in a blue moon.
You “Purchase” for $0 the forum support it is only a regsitration.
CSS may help you overrule the theme, or you might try a different plugin style under Settings/ View.
But visiting that site again, it appears the search is broken besides the map issue, this usually indicates a Javascript issue.
https://docs.storelocatorplus.com/q-i-see-a-gray-map-or-blank-map-and-search-does-not-work/