CAS System

I am trying to load Wow Retail and I keep getting this:

The CAS system was unable to initialize: Tact instance creation failed

Error (16): container locked

Tact instance creation failed. Error (16): container locked

can anyone please help with this issue

should I try uninstalling and reinstall completely Help somebody please

The official knowledge base has this offering,

https://us.support.blizzard.com/en/help/article/13934

Ty so much I did as the link suggested and it worked

I did all this and the error is still occurring.