❔ EF Core Person Task List

I have the program running and saving data on the back-end however I am running into a few exceptions in the windows form upon run. I've tried to implement quite a few different scenarios but I cant seem to figure the form part out here. Can someone shed some light on what I could possibly be doing wrong and get the form to work properly. https://paste.ofcode.org/Mi29XgTfzV4cmHgmw4HE84