i got this error

Fatal error: Uncaught Error: Class ‘FROU\Plugin_Core’ not found in /home/madmax/public_html/neufsvies/wp-content/plugins/file-renaming-on-upload/file-renaming-on-upload.php:29 Stack trace: #0 /home/madmax/public_html/wp-admin/includes/plugin.php(1882): include() #1 /home/madmax/public_html/wp-admin/plugins.php(164): plugin_sandbox_scrape(‘file-renaming-o…’) #2 {main} thrown in /home/madmax/public_html/neufsvies/wp-content/plugins/file-renaming-on-upload/file-renaming-on-upload.php on line 29