I believe the bug is not yet fixed. xrdp-service is now starting, but starting xrdp leads to an error. Proposed fix is to remove the line "RuntimeDirectory=xrdp" from xrdp.service:
--- a/instfiles/xrdp.service +++ b/instfiles/xrdp.service @@ -7,7 +7,6 @@ After=network.target xrdp-sesman.service [Service] Type=forking PIDFile=/run/xrdp/xrdp.pid -RuntimeDirectory=xrdp EnvironmentFile=-/etc/sysconfig/xrdp EnvironmentFile=-/etc/default/xrdp User=xrdp