I found out that the site is using ovh as hosting.
My client hasn’t access to ovh because developer created the ovh account didn’t give access to client. He gave to client only WordPress access. For now, I’m making redesign for the site and I’ve installed WP plugin which has provided an “508 Resource Limit Is Reached” error.
Please, tell me how can I fix the error? I can’t reach the site because I’m getting the error. I even haven’t PMA access for disabling the plugin.