Vagrant 2.2.19 broke support for CINC back in 2021, and it’s still broken in the latest release.
There’s an open GitHub issue (#12587) tracking this, but it’s never been assigned, and bots keep auto-closing it for inactivity before anyone actually looks at it.
The bug: CINC installs successfully, but Vagrant’s post-install check fails because it doesn’t recognize the CINC binary name, it’s only checking for chef. The fix looks like it’s only a couple of lines.
Could someone from the maintainer team take a look and get this assigned? It’s a small fix that’s been left in limbo for years despite repeated activity on the issue.