Seems to be related to this bug: https://community.nodebb.org/topic/9418/windows-server-2012-problem-again/31
I'll test if the other bugs are fixed too with this.
Edit: Verified this.
I know it's a plugin, but it's a pretty serious bug in my opinion.
The local email plugin is giving me a "page not found" in the ACP!
Not Found You seem to have stumbled upon a page that does not exist. Return to the home page.
@Giorgio-Chiodi Have you restarted nodebb?
@a_5mith yes. multiple times. no luck.