You can try to disable the WP Theme (use default theme) and all plugins, and refresh the page to test the functionality. Then enable back the WP Theme / plugins and check to see if there’s any conflict with any of them.
If you’re still facing issues, kindly provide below details via the contact form here https://codecanyon.net/user/highwarden and we can open a ticket to get our tech team to have a closer look
1) url of store locator
2) link to screenshot / description of the issue
3) temporary WP admin access
4) temporary FTP access
5) purchase code with active support