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The VMware "vmnet" devices are failing to start. The most common
reason for this is collisions with existing network services. For
example, if a hostonly network space collides with another hostonly
network (such as with VirtualBox), it will fail to start. Likewise,
if forwarded ports collide with other listening ports, it will
fail to start.

Vagrant does its best to fix these issues, but in some cases it
cannot determine the root cause of these failures.

Please verify you have no other colliding network services running.
As a last resort, restarting your computer often fixes this issue.