Pls fix your launcher blizzard

Since last saturday I got blzbntbna00000005 error on my launcher. I tried literally everything, I used the tickets but they always tell me to uninstall and reinstall. I tried to do everything at all the topics of this error on the forum. I don’t know what to do. I bought BO4 three days ago and still can’t install.

Ran Scan and repair. Would not work again. Done all suggested processes for accessing account. TO DATE no access this has happened since the last “update”

I dont know how to do it. Can you tell me?