Folder Missing? /plugins/wpdatatables/assets/images

When I check the http://www.curatron.com site with DeadlinkChecker.com, it reports many dead links for the folder at:

http://www.curatron.com/wp-content/plugins/wpdatatables/assets/images/

See errors in the Excel spreadsheet linked below.

https://1drv.ms/x/s!ArpSupd4I4lns5ByAJr6iPT6Jz_xRQ

I have deactivated, uninstalled and reinstalled the plugin and the error is still there?

ANy ideas?

https://wordpress.org/plugins/wpdatatables/