Install on headless Debian 10 (VPS)
Hello,
I have to compare different remote desktop solutions from Windows to Debian server (headless).
For the tests, I use a Debian 10 VPS with LXDE as GUI.
I can successfully access it with Windows Terminal Server from Windows 8.1 (xrdp) + Open VPN and use Firefox.
I can successfully access it with X2go + SSH tunnel and use Firefox.
Alas, I have big problems with TeamViewer 15.9.4 x86_64bit ! 
(
Under an SSH session, I've done, as root:
# wget https://download.teamviewer.com/download/linux/teamviewer_amd64.deb
# apt-get install ./teamviewer_amd64.deb
# reboot
# /usr/bin/teamviewer info
TeamViewer 15.9.5 (DEB)
TeamViewer ID: **Please do not post TeamViewer IDs**
teamviewerd status ● teamviewerd.service - TeamViewer remote control daemon
Loaded: loaded (/etc/systemd/system/teamviewerd.service; enabled; vendor preset: enabled)
Active: active (running) since Sat 2020-09-12 23:19:43 CEST; 28min ago
Process: 617 ExecStart=/opt/teamviewer/tv_bin/teamviewerd -d (code=exited, status=0/SUCCESS)
Main PID: 641 (teamviewerd)
Tasks: 14 (limit: 2312)
Memory: 14.8M
CGroup: /system.slice/teamviewerd.service
└─641 /opt/teamviewer/tv_bin/teamviewerd -d
Sep 12 23:19:42 vps1234 systemd[1]: Starting TeamViewer remote control daemon...
Sep 12 23:19:43 vps1234 systemd[1]: teamviewerd.service: Can't open PID file /run/teamviewerd.pid (yet?) after start: No such file or directory
Sep 12 23:19:43 vps1234 systemd[1]: Started TeamViewer remote control daemon.
What is this 1st error ? How can I solve it ?
License well accepted:
# /usr/bin/teamviewer license accept
License agreement has already been accepted.
Device is not assigned to an account. Please run interactive setup.
Problem with setup:
Please enter your e-mail / username: p***@yahoo.fr
Please enter your password: ********
Initiating sign in
Sign in failed! [Unknown reason]
Connected
"Unknown reason" : that's very helpful ! 
I'm sure the password is good: it's the same I used to login to this forum.
What is this "Unknown reason" ? How can I solve the problem ?
I can give you any useful additional info.
I hope someone will help me so I won't be sad to remove Teamviewer from the list of potential nice solutions for remote desktop.
Regards,
Steve.
