The message box is too small, very hard to see the words

[onepersonhere]

Steps to reproduce: Open the application -> maximise the window -> type add in the command line.

As you can see from the image, the message box is too small for the String displayed. This makes it very hard to view the error message as I need to scroll down/sideways in order to view the entire message.
This is perhaps due to the fact that the message box is unable to be resized. I would suggest allowing the user to be able to resize the message box together with the window.