Hello @Tal,
We checked and found that someone’s modified your htaccess file yesterday → https://prnt.sc/5RAFW-baqNyR that possible created redirects for customers to the page with error.
But after deeper check we found that you had activated Maintanance mode in XStore Control Panel → https://prnt.sc/mCJ5Y2XKwZEQ
For now, we disabled it and now your web-site functioning properly.
Kind Regards,
8theme team