Hi YoungShatner and larissatode,
Yes it’s the sidekick for HubSpot downloaded it from the office 365 store, connect to your HubSpot account an it now works with my Macbook Pro. It seems to have fixed it https://knowledge.hubspot.com/articles/kcs_article/settings/how-to-install-hubspot-sales
I have installed the individual add in not the centrally managed add in.
Hope this helps, anyway it all works for me now.