Reports Preview not working

Just received the update a couple days ago. I fixed a couple migration issues related to templates but am unable to resolve an issue with the admin reports page. When I try to preview a report I get the following error:

Fatal error: Uncaught Error: Class ‘es_cls_registerhook’ not found in /home4/eqgdgtmi/just4funcrafts.com/wp-content/plugins/email-subscribers/includes/admin/class-es-reports-table.php:390 Stack trace: #0 /home4/eqgdgtmi/just4funcrafts.com/wp-content/plugins/email-subscribers/includes/admin/class-es-reports-table.php(341): ES_Reports_Table->preview_email(‘101’) #1 /home4/eqgdgtmi/just4funcrafts.com/wp-content/plugins/email-subscribers/includes/admin/class-es-reports-table.php(289): ES_Reports_Table->process_bulk_action() #2 /home4/eqgdgtmi/just4funcrafts.com/wp-content/plugins/email-subscribers/includes/admin/class-es-reports-table.php(51): ES_Reports_Table->prepare_items() #3 /home4/eqgdgtmi/just4funcrafts.com/wp-content/plugins/email-subscribers/admin/class-email-subscribers-admin.php(211): ES_Reports_Table->es_reports_callback() #4 /home4/eqgdgtmi/just4funcrafts.com/wp-includes/class-wp-hook.php(286): Email_Subscribers_Admin->load_reports(”) #5 /home4/eqgdgtmi/just4funcrafts.com/wp-includes/class-wp-hook.php(310): WP_H in /home4/eqgdgtmi/just4funcrafts.com/wp-content/plugins/email-subscribers/includes/admin/class-es-reports-table.php on line 390