I have to use Zoom. I have to upgrade it every time In need to use it, which is once a month. You have to get the Ubuntu upgrades and Zoom upgrades in sync. Try the newest version, if it does not work, upgrade Ubuntu Mate, and then try to upgrade again. A few times it was not in sync and I had to use the browser instead of the Zoom program. Always check before the Zoom meeting that it works, so you have time to upgrade if it doesn't.