Premium theme fails with “404; requested does not exist”

Hello,

I was trying to find out if our premium theme (ca. 4 years old) is PHP8 compatible. Your plugin says

Response status: 404
Message: The audit requested does not exist.

I don’t understand what to do now. Is there any possibility to scan this theme?

Other people appear to have the same problem:
https://www.ads-software.com/support/topic/the-404-message-for-premium-plugins-should-be-improved/

Thanks ??