Installed without application menu or dock icon

Hi there,
I just installed LibreOffice and something has gone wrong. Here are the details:
Hardware: Mac Mini late-2014
System: macOS Sierra 10.12.1

LibreOffice is in my Applications folder and I can open it, but the icon appears and bounces just momentarily in my dock before disappearing. Still worse, no application menu opens - the top of my screen simply continues to display the application menu for whichever application I was using before opening LibreOffice.

I tried uninstalling and reinstalling the whole app, but that hasn’t resolved the problem. And now I’m out of ideas! Any thoughts about the source of the problem and how I might fix it?

Thanks! may be helpful