Seeing a “Site Currently Unavailable” message can feel frustrating, but you can...

https://wiki-club.win/index.php/Site_Currently_Unavailable_After_Uploading_a_New_Theme:_What_to_Do_Next

Seeing a “Site Currently Unavailable” message can feel frustrating, but you can fix it. First, check your site’s DNS settings or make sure file permissions aren’t blocking access. If the problem persists, contact your hosting provider for help