Destination Host Unreachable

Maybe; we can’t be sure as “HTTP Error 500” is too generic. Have you enabled display errors and any debug settings as shared in the article above by @JxstErg1?

Looking at the project, I can see that the last release was on April 8, 2022, but the project seems to be actively developed, so perhaps they’ll make a new release soon, or you can try upgrading to the developer version and see if it works.