Problem with CD key after update

[SmileyFromNapf 0]

I updated my DayZ version from 1.8.0.3 to 1.8.1 with DayZ Commander, but now whenever I try to join a server from Steam or DayZ Commander, I get "Bad Serial Given in Setup". When I launch from Steam, I get this error: 

error compiling pixel shader psspecularalpha:0

 

Idk why it's all blown up and huge and stuff lol but whatever. I would love some help if at all possible <3