Custom Created UMG doesn't look so good when rendered on main canvas. Please help.

Hi everyone, first of all I am sorry if this is something easy to fix or find in google, you see. English is not my first language and I honestly don’t know what to google for in this particular situation.
What happens is that I created a custom widget. I want to add the widget to another widget where my main canvas is, however when I do that everything gets messed up and I end up with something that looks like it was spawned by some sort soldier of doom.

I thank you for your kind help.