✅ Can't figure out display error avalonia

it does. thank you. I do have another question if that's alright. https://pastebin.com/Tb5hLMvs this is my main window view model. When I run my program, I get the screenshot as a result and I don't know why. Any ideas? and this is my app.axaml.cs file https://pastebin.com/LcPLyT8R