I was unable to install Libre Math. I also posted that issue here. But no solution was working. For that I reinstall Zorin OS. Now I'm facing this error while installing "Open Bangla Keyboard" deb file.
Please note that, previously I installed this app without any tweaks.
I installed other deb files. They work fine. Just this one is causing issue.
Please run in terminal
killall gnome-software
sudo apt update
sudo apt full-upgrade
Launch Software Store and try installing.
I think you have downloaded the wrong version of the deb file, you need the debian 10 version.
Yes, you are right. Thank you a lot.
Everything sorted?
Let us know! 
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