Updated to 11.5.30 from 11.0.9 and Now Getting 500.19 Error

[iltera]

I made a stupid judgement and asumed it's already safe to update my production server to 11.5. Now I'm getting 500.19 Internal Server Error which says

Absolute physical path "%domain_dir%\error_docs\bad_request.html" is not allowed in system.webServer/httpErrors section in web.config file. Use relative path instead.

I have all my domains down at the moment, I could make panel work by deleting a password line which wasn't there before the upgrade. But same doesn't work for domains. It's an urgent problem, any help is appreciated!

Thanks in advance!..

 

[iltera]

I'm now getting

HTTP Error 401.3 - Unauthorized You do not have permission to view this directory or page because of the access control list (ACL) configuration or encryption settings for this resource on the Web server.

error when I try to open Plesk Panel. Can somebody guide me with the correct user permissions on admin/htdocs folder?