403 Forbidden

Hello all, so, I put my .php , “CheckValue.php”, in the file manager/htdocs and everything however, when i try at access the .php through a c# script, it returns a 403 error. Any help would be appreciated.
My site is: http://deedata.epizy.com
.php location: http://deedata.epizy.com/database/CheckValue.php

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