PHP Error

I am required to upgrade my PHP from 7.4 to avoid being charged maintenance. Unfortunately, if I upgrade the PHP both “Download Manager” and “WPDM Archives” throw fatal errors. No updates show available in the control panel. Please advise. Here is the error from Download Manager:

Fatal error: Uncaught Error: Call to undefined function create_function() in /homepages/11/d447043848/htdocs/public/wp-content/plugins/download-manager/widgets/class.CatPackages.php:101 Stack trace: #0 /homepages/11/d447043848/htdocs/public/wp-content/plugins/download-manager/modules/widgets.php(7): include_once() #1 /homepages/11/d447043848/htdocs/public/wp-content/plugins/download-manager/wpdm-core.php(406): include(‘/homepages/11/d…’) #2 /homepages/11/d447043848/htdocs/public/wp-content/plugins/download-manager/download-manager.php(39): include(‘/homepages/11/d…’) #3 /homepages/11/d447043848/htdocs/public/wp-admin/includes/plugin.php(2314): include_once(‘/homepages/11/d…’) #4 /homepages/11/d447043848/htdocs/public/wp-admin/plugins.php(192): plugin_sandbox_scrape() #5 {main} thrown in /homepages/11/d447043848/htdocs/public/wp-content/plugins/download-manager/widgets/class.CatPackages.php on line 101