Hi, As tracked in https://bugs.debian.org/1092987 :
Due to a change in HashiCorp's infrastructure, the vagrant Debian package no longer works (not able to download boxes). HashiCorp says that users should update to the BSL-licensed Vagrant version (which is non-free). I do not plan to continue to maintain Vagrant Debian images if they are unusable with the (free software) Vagrant package in Debian. Please continue discussion in #1092987 if needed. Lucas
