Cant reset admin password

Cant reset admin password

Hellow, i am forgot admin password in NetFlow Analyzer 12
When i try to recovery password using this instruction:

https://pitstop.manageengine.com/portal/en/kb/articles/nfa-and-ncm-12-default-admin-password-reset

i get error:

Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 0
at com.manageengine.opmanager.server.util.ResetPassword.main(ResetPassword.java:186)
-----------------!!BEST PRACTICE!!---------------------------------------------
Use Forgot Password option available in login page to reset passwords of local authenticated users.
Mail Server Settings and Email-Id in User Profile are required for the Forgot Password feature to notify the new password via email.
-------------------------------------------------------------------------------

maybe anyone faced with this situation?