Game works fine in editor but completely breaks down on build

Hello there!

I tried making my first project, to learn about Unity. Everything works fine in the editor but when I build the game, the build complete itself. I tried the file on another pc and there it completely crashes before even booting up.

What goes wrong? When it should load the mainmenu scene, it only loads half of it, making it half transparent. The volumeslider on said menu also copîes its handlebutton like this. A number of other things go wrong as well.

This is the output log from the original PC the project was build on and this is the output log from the crashpc.

I hope someone can help me as I put a lot of work into this, and like I said, it works fine in the editor.