xrdp changing to xrdp.service: Can't open PID file /run/xrdp/xrdp.pid (yet?) after start: Operation not permitted after functioning well.

Last week I enabled a remote desktop on my droplet. I used the guide of the Digital Oceans’s blog article “How To Enable Remote Desktop Protocol Using xrdp on Ubuntu 22.04”. I followed all the steps and finally I got it. I was working until today I tryed to connect the remote desktop and I got an error message “Unable to connect. We couldn’t connect to the remote PC. Make sure the PC is turned on and connected to the network, and that remote access is enabled. Error code: 0x204”. I connected the console and I could see the rdp is not working. I have done everything but xrdp remains the same:

root@ubuntu-s-2vcpu-4gb-amd-sfo3-01:~# sudo systemctl status xrdp
● xrdp.service - xrdp daemon
Loaded: loaded (/lib/systemd/system/xrdp.service; enabled; vendor preset: enabled)
Active: active (running) since Sun 2023-10-08 13:21:27 -05; 4h 29min ago
Docs: man:xrdp(8)
man:xrdp.ini(5)
Process: 822 ExecStartPre=/bin/sh /usr/share/xrdp/socksetup (code=exited, status=0/SUCCESS)
Process: 837 ExecStart=/usr/sbin/xrdp $XRDP_OPTIONS (code=exited, status=0/SUCCESS)
Main PID: 842 (xrdp)
Tasks: 1 (limit: 4656)
Memory: 1.7M
CGroup: /system.slice/xrdp.service
└─842 /usr/sbin/xrdp
Oct 08 13:21:26 ubuntu-s-2vcpu-4gb-amd-sfo3-01 xrdp[837]: (837)(140443694966592)[INFO ] address [0.0.0.0] port [3389] mode 1
Oct 08 13:21:26 ubuntu-s-2vcpu-4gb-amd-sfo3-01 xrdp[837]: (837)(140443694966592)[INFO ] listening to port 3389 on 0.0.0.0
Oct 08 13:21:26 ubuntu-s-2vcpu-4gb-amd-sfo3-01 xrdp[837]: (837)(140443694966592)[INFO ] xrdp_listen_pp done
Oct 08 13:21:26 ubuntu-s-2vcpu-4gb-amd-sfo3-01 xrdp[837]: (837)(140443694966592)[DEBUG] Closed socket 7 (AF_INET6 :: port 3389)
Oct 08 13:21:26 ubuntu-s-2vcpu-4gb-amd-sfo3-01 systemd[1]: xrdp.service: Can't open PID file /run/xrdp/xrdp.pid (yet?) after start: Operation not permitted
Oct 08 13:21:27 ubuntu-s-2vcpu-4gb-amd-sfo3-01 systemd[1]: Started xrdp daemon.
Oct 08 13:21:28 ubuntu-s-2vcpu-4gb-amd-sfo3-01 xrdp[842]: (842)(140443694966592)[INFO ] starting xrdp with pid 842
Oct 08 13:21:28 ubuntu-s-2vcpu-4gb-amd-sfo3-01 xrdp[842]: (842)(140443694966592)[INFO ] address [0.0.0.0] port [3389] mode 1
Oct 08 13:21:28 ubuntu-s-2vcpu-4gb-amd-sfo3-01 xrdp[842]: (842)(140443694966592)[INFO ] listening to port 3389 on 0.0.0.0
Oct 08 13:21:28 ubuntu-s-2vcpu-4gb-amd-sfo3-01 xrdp[842]: (842)(140443694966592)[INFO ] xrdp_listen_pp done

Could you please help me to recover my remote desktop? Regards,