Not compatible on Basecamp (web app)

My company just migrated from Slack to Basecamp 😢  which has left much to be desired in the chat world. Just tried using Command on the Basecamp site and it doesn't seem to work (https://www.useloom.com/share/06a1d7950c2d4b71a5f774e9075cac32). FYI.

Thanks for your work on this!