PLEASE HELP!!! App suddenly stopped building

I am building an app in Swift Playgrounds 4 and it suddenly stopped working without any errors. When I go to run the app it says, "Build failed because the Mach-O file couldn't be generated". I've tried looking for any errors but I can't find anything. I attached the whole project if anyone would be kind enough to look through it for me. https://www.icloud.com/iclouddrive/0fa4WViSAUZGAbAhYxYL4XEUg#Smart_Work (I think you need to request access or something so I will approve if any of you will look through it for me) Thanks! ***actually just comment if you would be willing to look at it and i’ll get it to you. the link doesn’t work

PLEASE HELP!!! App suddenly stopped building
 
 
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