Vagrant up --> ssl read error

After typing vagrant up, I see this error code:

An error occurred while downloading the remote file. The error
message, if any, is reproduced below. Please fix this error and try

SSL read: error:00000000:lib(0):func(0):reason(0), errno 104 category:12

It happens after trying to download the bento/box line:
default: Downloading:

I am running linux mint.