Fatal error: Unknown: Cannot use output buffering in output buffering display handlers in Unknown on line 0

Fatal error: Call to a member function get_row() on a non-object in /nfs/c09/h02/mnt/134373/domains/clonliffeharriersac.com/html/wp-content/plugins/wp-simple-pay-pro-3/includes/core/libraries/wp-native-php-sessions/inc/class-session.php on line 24