I can not add parameters when invoking contracts.
I encounter the problem too
Me too

one of my team mates found out that the buttons below the textbox was not placed properly.
Form: ParametersEditor.cs
Drag the buttons on where it can be seen
Thank you
Ditto. @birmas do you know who is maintaining neo-gui-developer?

I am facing the same issue. Unable to add parameters
@reinarukami how to add the button ? cant seem to find it, not a c#er,
anyone working on this issue guys ?
In ParametersEditor.cs[Design] hold Ctrl+A and notice in New Value group some object can not be see, try to move NewValue Group. hope that it will help you. :)