Clear your cookies first. Then go to your website and click on Admin-Login. There is a link there to recover or reset your password. The process seems automated, so you should get an email pretty quickly.
The above works if your tree is public, but if it is not, I see the problem.
What is your website URL? You can try the following where xxxxx should be replaced with your site name:
https://XXXXX.tribalpages.com/tribe/browse?userid=XXXXX&view=500&ver=213