To log into your Causely dashboard, go to Causely.com and click on Login at the top right.
From there you will select "Sign In With Facebook" and enter your Facebook credentials to take you to the dashboard.
If you are still unable to login, be sure you are using the original Facebook account that was used at signup. You may need to request an invite from the current administrator for your Causely account. You can check out this article to find out more about inviting another user to get logged into the Dashboard.