Install Softmaker deb

 $ sudo dpkg -i softmaker-freeoffice-2021_1040-01_amd64.deb
[sudo] password for dhwan:
Selecting previously unselected package softmaker-freeoffice-2021.
(Reading database ... 302243 files and directories currently installed.)
Preparing to unpack softmaker-freeoffice-2021_1040-01_amd64.deb ...
Unpacking softmaker-freeoffice-2021 (3120) ...
Setting up softmaker-freeoffice-2021 (3120) ...
Using existing xdg-utils
Create MIME
Adding document icons. This may take a few minutes...
Updating theme Adwaita /1 of 2/
Updating theme breeze /1 of 2/
Updating theme breeze-dark /1 of 2/
Updating theme hicolor /1 of 2/
Updating theme HighContrast /1 of 2/
Updating theme Humanity /1 of 2/
Humanity modification start
Updating theme Yaru /1 of 2/
Updating theme Adwaita /2 of 2/
Updating theme breeze /2 of 2/
Updating theme breeze-dark /2 of 2/
Updating theme hicolor /2 of 2/
Updating theme HighContrast /2 of 2/
Updating theme Humanity /2 of 2/
Humanity modification start
Updating theme Yaru /2 of 2/
Registering MIME types...
Creating /etc/SoftMaker folder...
Installing for user dhwan
Installing for user harun
Cleaning the cache from folder: /var/tmp/kdecache-*/*
Adding icons to the menu...
Processing triggers for mime-support (3.64ubuntu1) ...
Processing triggers for bamfdaemon (0.5.3+18.04.20180207.2-0ubuntu2) ...
Rebuilding /usr/share/applications/bamf-2.index...
Processing triggers for gnome-menus (3.36.0-1ubuntu1) ...
Processing triggers for desktop-file-utils (0.24-1ubuntu3) ...
Processing triggers for shared-mime-info (1.15-1) ...
Processing triggers for libc-bin (2.31-0ubuntu9.2) ...