Cannot open attached images in version 2.1.0

I have 2 installations of support candy, on different websites on different cpanel accounts. BOTH stopped working at the same time. When we try to open an attached picture we get an error (below). There have been no settings changes on either site in months, all updates have been done. Old tickets that opened before, no longer open. Verified the “file type” (jpg) is allowed in admin. Ideas??

(error message including debug code)

Fatal error: Uncaught Error: Call to undefined function mime_content_type() in /home/bellahoot/public_html/support/wp-content/plugins/supportcandy/includes/class-wpsc-actions.php:518 Stack trace: #0 /home/bellahoot/public_html/support/wp-content/plugins/supportcandy/includes/class-wpsc-actions.php(483): WPSC_Actions->file_download(573) #1 /home/bellahoot/public_html/support/wp-includes/class-wp-hook.php(288): WPSC_Actions->check_download_file(”) #2 /home/bellahoot/public_html/support/wp-includes/class-wp-hook.php(312): WP_Hook->apply_filters(NULL, Array) #3 /home/bellahoot/public_html/support/wp-includes/plugin.php(478): WP_Hook->do_action(Array) #4 /home/bellahoot/public_html/support/wp-settings.php(523): do_action(‘init’) #5 /home/bellahoot/public_html/support/wp-config.php(78): require_once(‘/home/bellahoot…’) #6 /home/bellahoot/public_html/support/wp-load.php(37): require_once(‘/home/bellahoot…’) #7 /home/bellahoot/public_html/support/wp-blog-header.php(13): require_once(‘/home/bellahoot…’) #8 /home/bellahoot/p in /home/bellahoot/public_html/support/wp-content/plugins/supportcandy/includes/class-wpsc-actions.php on line 518

There has been a critical error on your website.