Your earlier topic (same subject) has been closed
I installed Parrot os on a pendrive, enabled persistence and then followed the same page you did to try and enable XRDP:
I got it to work by adding “user” to the ssl-cert group and logging in from my Windows 10 pc as “user” password “toor”
I also set the display resolution to that of my pc though I don’t think had any effect!
ps. I’ve also tried in it vmware and virtualbox and Oracle virtualbox works best for me.