I’m finishing a project of a WinForm App and when I go to the GUI in design time, perform a click on an object like a TextBox or so, there’s nothing on the Properties window. Here’s a capture.

The project it compiles but when I try to show a secondary WinForm I get an exception.

I’m showing the secondary WinForm with this line

ConfigForm.ShowDialog()

And the exception says: System.ArgumentException: ‘Cannot bind Forward_Port property or column in DataSource.
Parameter name: dataMember’

Casually the only WinForm with this issue is this secondary WinForm

What could be happening?

Edit:
The Properties window now shows the TextBox properties but I’m still getting the exception when I try to open the secondary WinForm.