[2019] Negative 345 Silver Wolf error... What is it? I know they’re saying “Some players” are experiencing issues, but do we have a ETA on a fix? This is super frustrating.

Here's a handy link: https://support.activision.com/articles/en_US/FAQ/Error-Codes-in-Call-of-Duty-Black-Ops-4/

I'm also going to call on /u/ATVIAssist for additional support.