That’s logical because you’re unfortunately locked yourself
If you removed your own permissions to make changes to files (i.e. permissions lower than 600), then you cannot make changes to those files again, including changing their permissions. Unfortunately, there are no safeguards at this time to prevent you from locking yourself out, and no way to reset file permissions if you do.
Please try to recreate your website on a different account (create new acc)
we do not think of a new registration (do not be confused)
just go to the client area
and at the top you will have a button