Libraries are NOT fool proof, actually a huge time sink

I created a new project, so we’re working with Main again. Same file, same code.

It compiles. Parts of it already work. I’m trying to figure out why the servo isn’t servoing, so I ran Test.

This is something that drives me crazy: undefined reference to loop, setup. I see ‘multiple definitions’ and ‘undefined’, and I never understand how I raise that error.

I inserted a main function, to see if that would change anything, and I deleted the pio folder. Didn’t.

How am I raising this error? Is it the same error???