Firewall off, all connections being allowed & passed through edge router. Tried both net connections, fails on both, took to work for comcrap fiber there and same thing.
All torrents are fine, just can’t get it to work again with newnabs, but I can access all newznabs sites with no problems.
If you check debug logs you’ll get the URLs, which should load in IE and Edge on the system running Sonarr (they’ll either load text or download a file probably).
I decided instead of screwing with it, that I was going to try a fresh reinstall of sonarr. It is working and I still have no idea what is going on with my original configuration.
Installed on a backup 2016 server, not sure what the hell happened, but one I started removing & readding indexers, everything started working again.