This is on SiteGround. I am unable to edit files. This is what support said"
have carefully checked the case and it seems the issue is caused by the fact that your theme is domain dependent and can not be used on any other domain than sfdancefilmfest.org.
The theme seems like custom-designed and has checkers which detect that the URL is different and brings up the error message.
Unfortunately in this situation this design feature of your theme is not compatible with the staging environment and there is no workaround.
Technical Support Team
I will provide login info. Please advise.
Just to be sure I reset the validation code which did not help. This is the error
The preview could not load due to misconfigured URLs. This could happen if you are using multiple environments and the site URL was not updated after migrating.