I have followed the two fixes suggested in question 118662.
In my case, Anydesk does not start up after installation on a PI4, Raspberry OS 64bit. - I click on the icon, a time glass replace the cursor for a couple of seconds, then ..nothing.
re installation
admin@nord:~ $ sudo dpkg -i anydesk_6.1.1-1_armhf.deb
(Reading database ... 95114 files and directories currently installed.)
Preparing to unpack anydesk_6.1.1-1_armhf.deb ...
Removed /etc/systemd/system/multi-user.target.wants/anydesk.service.
Warning: The unit file, source configuration file or drop-ins of anydesk.service changed on disk. Run 'systemctl daemon-reload' to reload units.
Unpacking anydesk:armhf (6.1.1) over (6.1.1) ...
Setting up anydesk:armhf (6.1.1) ...
Created symlink /etc/systemd/system/multi-user.target.wants/anydesk.service → /etc/systemd/system/anydesk.service.
Processing triggers for gnome-menus (3.36.0-1) ...
Processing triggers for mailcap (3.69) ...
Processing triggers for desktop-file-utils (0.26-1) ...
Processing triggers for hicolor-icon-theme (0.17-2) ...
admin@nord:~ $ sudo systemctl daemon-reload
admin@nord:~ $