The Domains > example.com > ASP.Net Settings > Change Version button fails with the error:
Error: An invalid URL was requested.
Bug PPPM-13996 which was fixed in Plesk Obsidian 18.0.53.
Consider to update Plesk.
- If an update is not possible for some reason, as a workaround, switch the version in Domains > example.com > Hosting & DNS > Hosting Settings menu instead.