Fatal error: Class ‘FileReader’ not found

The agenda plugin 1.7 doesn’t work well. Message: Fatal error: Class ‘FileReader’ not found in E:\XAMPP\xampp\htdocs\wordpress\wp-content\plugins\agenda\agenda.php on line 21

Dear forummembers,

I can’t get this agenda plugin to work. Installing goes perfect. I see the added events button @ the posts- and settingssection but when I click on one of these two options I see the following error:

“Fatal error: Class ‘FileReader’ not found in C:\Users\silvershadow\Documents\My Projects\xampp\htdocs\kranck\wp-content\plugins\agenda\agenda.php on line 21”

Could someone give me a solution for this error, please?

Thanks in advance!

It creamed my widgets settings. Once I disabled it, the widgets setting area was back again. It may not play well with 3.01.