My notes from when I had this problem are a bit spotty, so there might be gaps in my information, but I think the solution I ended up using is pretty clear.
The Problem
One of the things Vagrant does is syncs everything in your project folder to /vagrant
on the VM. For some reason this was not working for me when using the ubuntu/xenial64
image. My final solution ended up not needing this, but at this point I did need it and either way it was weird that it wasn’t working.
I was also getting this error during the start of my vagrant up
: