Vagrant corrupted index file C:\Users\USERNAME\.vagrant.d/data/machine-index/index

Question

Same thing happened to me. So I just deleted the index file and the .lock file from the machine-index folder to get Vagrant working again.

When using Vagrant 2.2.5 in Windows 10, I had to navigate to /Users/{yourname}/.vagrant.d/data/machine-index and remove both index and index.lock, so rm index then rm index.lock.

Finally I navigated back to Homestead folder and ran vagrant up.