Plugin 'simple_form' enabled but not found! Try clearing cache

Hello
I can't log anymore with my credentials, the log :
- [2016-04-08 05:47:39] grav.WARNING: Plugin 'simple_form' enabled but not found! Try clearing cache with `bin/grav clear-cache` [] [] -
I have clear the cache with the CLI command, but still no success to login.

Any tips ?

Seems that plugin was manually removed but there's still a user/config/plugins/simple_form.yaml enabling it, can you check?

Content of user/config/plugins/simple_form.yaml :
-```
enabled: true

token: ""
template_file: "simple_form"

fields:

messages:
success: "Your message has been sent."

Resolved --> create new user, delete old one
Thanks