OpenRPA.Office is not showing under toolbox

I want to use ‘New MailItem’ functionality to send email but OpenRPA.Office is not showing under my toolbox. I tried to reinstall .msi multiple times but no luck

the msi installer checks for officer, and if a valid, supported office is not installed, it removed the option.
Simply install ms office 2010 or higher, and then re-run the msi installer.