Unable to log into the Trello desktop app via the 'Log in with Slack option'

Issue Summary

If you select to log into your Trello account via the 'Log in with Slack' option in the Trello desktop app, you land on a Slack error page: "We’re very sorry but your browser is not supported!"

Steps to Reproduce

1. Open the Trello desktop app (ensure you're logged out)
2. Try to log into your account via the 'Log in with Slack' option

Expected Results

You are taken through the login flow via your Slack account.

Actual Results

You land on a Slack error page:

Workaround

Current workaround is to log into the Trello account via a different method (i.e. email and password instead).