Azure Bot Message Extension auth open url -> Something went wrong, please try again

I have a message extension bot setup where you have to authenticate before you can use it. This has always worked previously but since a few days ago, when I click the sign in button sent from the compose extension I just get Something went wrong, please try again. No pop up opens, no logs, no other error. 

This worked previously fine. I have the url that opens in the valid domains and this is what I return to the azure bot 

return {
      composeExtension: {
        type: 'auth',
        suggestedActions: {
          actions: [
            {
              type: 'openUrl',
              value: ${signInUrl},
              title: Sign In Required,
            },
          ],
        },
      },
    };