GeForce Now screen blank issue

[SuperSpowart]

Can someone help me or give me advice to fix an issue I have with GeForce now?

 

I am having an issue with GeForce now where if I try to play any game that's on Steam (all of my games) it connects like normal and takes me into steam big picture where it gives me a prompt within big picture saying "This computer was deauthorized. You must enter a new Steam Guard code to re-authorize it." But when I click the Ok button, it takes me to a blank screen with a faint blue background from big picture, from this point, I cannot do anything to resolve it, I have tried contacting Nvidia but their email section is broken and their live chat isn't available. Can someone help me because I'm worried that I'm paying £5 for nothing.

[Npiet1]

Try reinstalling

[SuperSpowart]

I sadly cannot reinstall GeForce now as it's an issue with trying to sign in to steam on their end and I'm using a Nvidia Shield and I'm trying to see if I can resolve the issue myself