Troubleshooting: Custom Slack LoomioBot won't acknowledge authentication

I've got my own deployment of loomio and am attempting to get all the slack integrations up and running. I'm able to sign in to loomio via slack, but when I attempt to use my custom loomiobot in slack (ex. /loomio thread test), it replies with:

Just one more step: Click here to authorize your slack account to use Loomio. (You'll only have to do this once)

I've already authorized my loomiobot and no matter how many times I authenticate, the message doesn't change and the bot doesn't work. Any help would be greatly appreciated.