WordPress Toolkit when Caching (nginx) is enabled Server Error 403 Forbidden

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Server operating system version

Ubuntu 20.04.5 LTS

Plesk version and microupdate number

Plesk Obsidian Version 18.0.46 Update #2

Hello, I am using Plesk Obsidian.

When I enable Caching (nginx) on the WordPress Toolkit the website is Server Error 403 Forbidden.
If i disble the Caching (nginx) the website is back online.

I think this started after a plesk to plesk server migration.
Although other websites are working with the Caching (nginx) enabled on this server.