Can't resolve 'mitt'

[BHEADRICK]

after running
gatsby develop

I get the following error:
Can't resolve 'mitt' in '...\project-folder.cache'
If you're trying to use a package make sure that 'mitt' is installed. If you're trying to use a local file make sure that the path is correct.

File: .cache\emitter.js:1:0

[jeffpatzer]

@BHEADRICK looks like you have to install it separately npm i mitt