Fix XAML in visual basic project

Hi, I have a Visual Studio solution with a Visual Basic project, and in that VB project, I want to open a XAML window for the user to input 2 variables and 2 selections that can be used further in the project. When I try to add the window, I get a '[login to view URL]' error with message 'The calling thread must be STA, because many UI components require this.' I use threading in other projects of the solution and I know that's the cause of the problem, but I don't know how to fix it. This job is to fix the issue and finish the working of the XAML window. Thanks for bidding.