I have finished making a game; however, when I try to publish it. It publishes fine but when launching the application it crashes
SpriteFont
It says that it could not find MyFont.xnb (which is a SpriteFont in the content folder)
When I go to my Program Files and look, the SpriteFont is nowhere in my solution. Why did it not build with the rest of the program?
In my application itself, I made sure to include the asset and it works fine if I run the program on my machine. It only crashes like this after I publish the application.

How do I fix this issue?
Try checking the properties for the file in whatever compiler you're using.
In visual studio for example :
Make sure Build Action is set to compile.
Make sure copy to output directory is set to anything but do not copy, which is the default for monogame in my experience.