That’s weird, maybe an update broke something? What I would maybe do is uninstall Xrdp (and maybe remove/rename the old config files just in case), then re-install and configure it. From there if it’s still not working try to see what’s showing up in the log files maybe.

I did notice that Xrdp requires some extra configuration to work properly with Linux Mint Cinnamon, you apparently need to create a .xsession file in the home folder of whichever user you’re trying to remote into. I’m not on Linux Mint myself but maybe searching around will give you some tips e.g. this seems like a good rundown gist.github.com/…/2ab9b5d41bbaceca8471d591755a189…