Linux Mint 20 filed to install displaylink-driver-5.3.1.34

[highbeta]

thanks for you post, but I still have no success:

$ sudo apt-get install libc6-dev

Reading package lists... Done
Building dependency tree       
Reading state information... Done
libc6-dev is already the newest version (2.31-0ubuntu9.1).
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.

so libc6-dev is in newest version but:

sudo ./displaylink-driver-5.3.1.34.run 

Verifying archive integrity...  100%   All good.
Uncompressing DisplayLink Linux Driver 5.3.1.34  100%  
DisplayLink Linux Software 5.3.1.34 install script called: 
Distribution discovered: Linux Mint 20
logname: no login name
Failed to get session path: No session 'SESSION' known
./displaylink-installer.sh: line 634: : command not found
WARNING: Version 1.7.0 of EVDI kernel module is already running.
Please reboot before attempting to re-install DisplayLink Linux Software.
Installation terminated.

gives me still that no login error.
Any more ideas?