I made new install to Ubuntu Mate 18.04 distro. 20.04 have printing problems. After installation I made all fixes as I fount here.

tpv@tpv-ThinkPad-T61p:~$ sudo apt install cqrlog libmariadb3 libmariadb-dev mariadb-common mariadb-server
tpv@tpv-ThinkPad-T61p:~$ dbus-launch --exit-with-session cqrlog

The most important was reboot laptop after install. Without reboot database not start, connection problem. Now normal start up. Thank you guys for sharing solutions. Helped me a lot, 73 Timo OH7JHA