Steam error e20 ? What is it ?

[Xzall]

Hello,

I'm abit paranoid when it comes to these kind of things so I've decided to make a post about it.

Tried logging in 1h ago to steam and I was stuck in a infinite loop with Error E20 with a message saying I need to retry to connect or go in Offline Mode (neither options worked).

Every time I typed the password (either the valid password or a random one) I still got the same message.

Finally I was able to connect via my phone auth app by scanning the code.

Does anyone know what this error is? Scanned my PC with a AV and nothing pops up...hope it's not related to malware is it?