No HTTPS functions found. Use firebase functions:shell

Question

I've been trying all day to get my functions to run locally but I don't know why it keeps saying I have no functions. I'm using typescript, so I ran tsc in the functions folder, then ran sudo firebase serve --only functions, but I get this error:

i  functions: No HTTPS functions found. 
Use firebase functions:shell if you would like to emulate other types of functions.

Edit: I tried serving the function without sudo but I get permission issues:

Answer 1

Ok, I don't know why it worked, but I just restarted VSCode (because it had an update) and everything works now.