Vagrant up always prompts remote connection disconnect retrying!

Title:
Vagrant up always prompts remote connection disconnect retrying!

But it seems like sometimes it can start, and don't know why.

Remote Connection Disconnect retrying

I just restarted it again.

The guest machine entered an invalid state while waiting for itto boot. Valid states are 'starting, running'. The machine is in the'unknown' state. Please verify everything is configuredproperly and try again.If the provider you're using has a GUI that comes with it,it is often helpful to open that and watch the machine, since theGUI often has more helpful error messages than Vagrant can retrieve.For example, if you're using VirtualBox, run `vagrant up` while theVirtualBox GUI is open.The primary issue for this error is that the provider you're usingis not properly configured. This is very rarely a Vagrant issue.

Then he prompts out these statements, and then I vagrant ssh to find out again. What's going on?

Reply content:

Title:
Vagrant up always prompts remote connection disconnect retrying!

But it seems like sometimes it can start, and don't know why.

Remote Connection Disconnect retrying

I just restarted it again.

The guest machine entered an invalid state while waiting for itto boot. Valid states are 'starting, running'. The machine is in the'unknown' state. Please verify everything is configuredproperly and try again.If the provider you're using has a GUI that comes with it,it is often helpful to open that and watch the machine, since theGUI often has more helpful error messages than Vagrant can retrieve.For example, if you're using VirtualBox, run `vagrant up` while theVirtualBox GUI is open.The primary issue for this error is that the provider you're usingis not properly configured. This is very rarely a Vagrant issue.

Then he prompts out these statements, and then I vagrant ssh to find out again. What's going on?

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