Online Services issue

As per title, I require solutions.

Only started to happen a few days ago where online services and matchmaking doesn’t work. I goes in sequence. Load up game with no issues, attempt to match make quick play, no mission shows up and eventually gets error 140 popup.

Solutions I tried:

Reinstalling Verifying integrity Running as admin(causes game to launch incorrectly) Disabling steam overlay Disabling crossplay Reinstalling graphics drivers Restarting PC

So far switching to Wifi allows for matchmaking But over ethernet it cannot matchmake and will just error code me.

One factor I did realise is that ethernet connects to my 2.4 ghz. Network

While Wifi I connect to 5 ghz network.

Not sure if those factors matter for ethernet cable tho.

I can play other online games just fine but it seems only spacemarine 2 has this issue.