Yo do not need to disable it in the whole server, your hosting should allow you to disable it only in some folders/domains.
All we can do is checking your server to see if we are able to remove that notices by code, but we would need to access to your FTP server to analyze/fix the errors.
If you wanna us to try, you can submit a ticket using the SUPPORT menu. My colleagues will ask you FTP credentials to access to your current site.
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