Php issues after update.

Website worked flawlessly but hadn’t updated for a while and almost all plugins, themes, and wordpress itself, needed updating. So I did. Now the website crashed…

I’m getting these error message and don’t know what to do, really…

Warning: get_class() expects parameter 1 to be object, null given in /var/www/shoothappens.com/sunesorensen.com/wp-content/themes/inspiro/functions/wpzoom/components/tgmpa/class-wpzoom-tgmpa-assistance.phpon line 50

Warning: call_user_func() expects parameter 1 to be a valid callback, first array member is not a valid class name or object in /var/www/shoothappens.com/sunesorensen.com/wp-content/themes/inspiro/functions/wpzoom/components/tgmpa/class-wpzoom-tgmpa-assistance.php on line 50

Warning: Cannot modify header information – headers already sent by (output started at /var/www/shoothappens.com/sunesorensen.com/wp-content/themes/inspiro/functions/wpzoom/components/tgmpa/class-wpzoom-tgmpa-assistance.php:50) in /var/www/shoothappens.com/sunesorensen.com/wp-includes/pluggable.php on line 1435

The page I need help with: [log in to see the link]