It had been a long time since I had completed any updates on site. I updated joomla from 3.9.24 to 3.10.6 which seemed to work fine. Then when I updated plugins the site crashed both front end and backend.
I believe it was the Helix Ultimate update which caused it to crash as I recieve message
public_html/beachfitdancecom/plugins/system/helixultimate/bootstrap.php'
(include_path='.:/opt/cpanel/ea-php80/root/usr/share/pear')
When I use PHP 8 and above and just get a blank screen when using PHP 7.x
I updated helix ultimate 1.1.2 to 2.0.7. However I did run "update all" so can't be certain it was Ultimate.