Vagrant up 时提示 Couldn't open file /D:/Homestead/metadata.json， If you want to check for box updates, verify your network conne ction？

$ vagrant up
Bringing machine 'homestead-7' up with 'virtualbox' provider...
==> homestead-7: Checking if box 'laravel/homestead' is up to date...
==> homestead-7: There was a problem while downloading the metadata for your box

==> homestead-7: to check for updates. This is not an error, since it is usually
due
==> homestead-7: to temporary network problems. This is just a warning. The prob
lem
==> homestead-7: encountered was:
==> homestead-7:
==> homestead-7: Couldn't open file /D:/Homestead/metadata.json
==> homestead-7:
==> homestead-7: If you want to check for box updates, verify your network conne
ction
==> homestead-7: is valid and try again.
==> homestead-7: Machine already provisioned. Run vagrant provision or use the
--provision
==> homestead-7: flag to force provisioning. Provisioners marked to run always w
ill still run.