When adding thumb plugin my website goes blank

my website went blank when I added thumb plugin https://github.com/bastianallgeier/kirbycms-extensions/tree/master/plugins/thumb
can anyone help me with it, please?

The thumb plugin is deprecated because the functionality is now part of the kirby core: http://getkirby.com/docs/toolkit/api/helpers/thumb

BTW: This is a great place to look for Kirby plugins: http://getkirby-plugins.com

thank you for your help