Fatal error: Cannot redeclare class

Fatal error: Cannot redeclare class Astoundify_Job_Manager_Contact_Listing in /home/trouvetoncontrat/public_html/job/wp-content/plugins/wp-job-manager-contact-listing-master/wp-job-manager-contact-listing.php on line 15

how can solved that error §??

https://ww.wp.xz.cn/plugins/wp-job-manager-contact-listing/