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We would need to know at least your domain to be able to give any kind of support.
I'm guessing your issue was with mysql being down, since it currently works I would not know what it did show for you, but my guess is it had mysql errors.
Easiest is probably to set a regular index.html page that would in that case take priority over any index.php, or you could talk to the script creator on how to hide the errors and make it show a more generic message without information on it.