Do you want some more on openSUSE ? 
Installed some packages:
- nfs-client
- typelib-1_0-Gtk-3_0
- python3-gobject
and ran tl-setup manually:
Configuring Services
====================
Configuring and starting ThinLinc services... Internal error
The ThinLinc Server Setup Wizard will now terminate.
2021-08-21 09:50:06,945: Configuring PAM...
2021-08-21 09:50:06,946: Created /etc/pam.d/thinlinc symlink
2021-08-21 09:50:06,946: Setting /vsm/setup_completed...
2021-08-21 09:50:06,967: Installing services...
2021-08-21 09:50:06,967: Installing service 'vsmserver'...
2021-08-21 09:50:07,354: Traceback (most recent call last):
2021-08-21 09:50:07,354: File "/opt/thinlinc/sbin/../libexec/tl-setup.py", line 303, in <module>
2021-08-21 09:50:07,354: oOoO00 ( )
2021-08-21 09:50:07,354: File "/opt/thinlinc/sbin/../libexec/tl-setup.py", line 259, in oOoO00
2021-08-21 09:50:07,354: I11 = O00oOoo0 . run ( )
2021-08-21 09:50:07,354: File "/opt/thinlinc/modules/thinlinc/wizard.py", line 99, in run
2021-08-21 09:50:07,354: return self . _run_text ( )
2021-08-21 09:50:07,354: File "/opt/thinlinc/modules/thinlinc/wizard.py", line 117, in _run_text
2021-08-21 09:50:07,354: Oo0O0o0oO000 ( )
2021-08-21 09:50:07,354: File "/opt/thinlinc/modules/thinlinc/tlsetup/services.py", line 269, in i111II
2021-08-21 09:50:07,355: ii1ii = iI1i ( )
2021-08-21 09:50:07,355: File "/opt/thinlinc/modules/thinlinc/tlsetup/services.py", line 203, in iI1i
2021-08-21 09:50:07,355: if not o0 ( "vsmserver" ) :
2021-08-21 09:50:07,355: File "/opt/thinlinc/modules/thinlinc/tlsetup/services.py", line 62, in o0
2021-08-21 09:50:07,355: ( i1111IIi , oOo00O ) = I1i . communicate ( )
2021-08-21 09:50:07,355: File "/usr/lib64/python3.6/subprocess.py", line 863, in communicate
2021-08-21 09:50:07,355: stdout, stderr = self._communicate(input, endtime, timeout)
2021-08-21 09:50:07,355: File "/usr/lib64/python3.6/subprocess.py", line 1578, in _communicate
2021-08-21 09:50:07,355: self.stderr.errors)
2021-08-21 09:50:07,355: File "/usr/lib64/python3.6/subprocess.py", line 760, in _translate_newlines
2021-08-21 09:50:07,355: data = data.decode(encoding, errors)
2021-08-21 09:50:07,355: UnicodeDecodeError: 'ascii' codec can't decode byte 0xe2 in position 78: ordinal not in range(128)
After enabling/starting vsmserver and vsmagent everything works as expected.