Can't NOT select tags? and Error

Hey there :slight_smile:

Using this great widget and having a small issue with an error and one other thing:

The error shows up when I try to select only one category to show. When I use the checkbox to "select all" it goes away.

the other thing, I can't NOT select tags. I want just a specific post category to show, but everytime I deselect tags then save the widget it shows back up.

any ideas?