Tried to add a second domain; broke site

I tried to add a second domain that I own, but now neither is functioning. The primary domain is: https://www.kateelisabethphotography.com. The secondary domain is https://www.kateelisabethallen.com. I can’t log in to WordPress. I go to wp-admin.php for https://www.kateelisabethphotography.com and the page is blank.

I am using BlueHost.

If you have suggestions on how to fix this I would really appreciate the help!