[Solved] Cannot add a formula

Good morning
I have got strange problem. After clicking Insert>Object, I cannot click “formula” because it’s grey and unclickable.
Is this feature require some exra addons for LO Writer?

Which operating system are you using? On Linux there is a package called libreoffice.*math.* (or similar), which sometimes is not installed by default.

That’s right.I use Zorin. It might be reason of that. I tried to install math manually, but i get:

sudo gdebi libreoffice7.0-math_7.0.4.2-2_amd64.deb 
Reading package lists... Done
Building dependency tree        
Reading state information... Done
Reading state information... Done
This package is uninstallable
Dependency is not satisfiable: libreoffice7.0 (>= 7.0.4.2)

Anybody can help?

Did you try to mix repositories of LibreOffice packages? Please provide info from Help -> About LibreOffice. Generally: A dependency problem on your operating is not a LibreOffice problem. The message looks like you don’t have LibreOffice version 7.0.4.2 installed while you try to install a package (module) exactly for that version.

Thank you. I reinstalled all LO packages, and now it works fine.