App not working when Canvas is on high resolution.

Hello.

I was creating an app with the canvas option. I am building an app that upscales images but I have a problem with the canvas. I need a minimum resolution of 3840 x 1920 for an image. But when I have the width of an image larger than 2000 pixels wide, the app does not want to open. How do I fix it? the app does not want to open. It crashes everytime I open it when the canvas is at 3840 X 1920 pixels.