Can’t authenticate Safari extension “Incorrect password.”

Alvin in Customer Support already helped me figure this out. There is an issue with 2FA in the Safari Extension. I disabled 2FA on my 1Password account and was able to log in on the extension successfully. Once I was logged in, and the device was registered, I was able to re-enable 2FA. Also, since the device is now registered, I am able to lock and unlock the extension freely.