The calling thread must be STA, because many UI components require this (with a strage senerio)

The calling thread must be STA, because many UI components require this
(with a strage senerio)

I am working on a web project. The server of the project uses SignalR. I
am getting this error "The calling thread must be STA, because many UI
components require this" only in release version and at time when user
attempts to login. When login button is pressed again this error doesn't
come up. I'm not sure what could be reason and how to resolve it. Any help
would be greatly appreciated.
Thanks.