Description of problem:

I run into this issue several times a day:
- https://github.com/vagrant-libvirt/vagrant-libvirt/issues/1445

This is fixed in this PR:
- https://github.com/vagrant-libvirt/vagrant-libvirt/pull/1485

Version-Release number of selected component (if applicable):

vagrant-libvirt-0.7.0-4.fc37.noarch

How reproducible:

Sometimes. It's probably a race condition as noted in the referenced bug above.

Steps to Reproduce:
1. Create a Vagrantfile that starts several boxes
2. Run vagrant up
3. Try #2 until you get:

    constant VagrantPlugins::ProviderLibvirt::Action::HandleBox not defined

Actual results:

I get:
    constant VagrantPlugins::ProviderLibvirt::Action::HandleBox not defined
and one of the boxes doesn't start.

Expected results:

All to always start.

Additional info:

Fixed upstream. My suggestion is to cherrypick the fix or to just upgrade vagrant-libvirt.