Class Magento\User\Observer\Backend\CheckAdminPasswordChangeObserver does not exist in Magento 2.0.4

Steps to reproduce

1. Open admin panel and Create new admin account
2. Edit created admin user
3. Fill "Your Password" and Click on save button

Expected result

1. Account should be saved with success message.

Actual result

1. Error : Class Magento\User\Observer\Backend\CheckAdminPasswordChangeObserver does not exist

[buskamuza]

@cedcommerce , do you have full exception log? Also, did you try to clean cache and var/di, var/generation?
If you had older version of Magento, some old generated class with reference to CheckAdminPasswordChangeObserver may still exist?

@buskamuza Yes you are right.
Thank You for your assistance