Authentication failed in snappymail

i change password defult but i when i try to log in this massge appear Authentication failed

ity old password and old but no one work

i try

but i see
No such file or directory

i try

but i see
Permission denied

@Snappy Mail Forgot Password - #3 by asporkan

Permission denied means most likely the user you are logged in at doesn’t have the permission.
Are you able to do:
sudo su -
To change into root account?