Object instantiation exception after 9.0.1 Lockdown Patch

[Guest]

After a successful installation and test of 9.0.1, I applied the 901 security lockdown patch and got this error when trying to access the administrator. Any idea what caused it and how to fix it?

Object instantiation exception.

An exception occurred while instantiating a Java object. The class must not be an interface or an abstract class. Error: org/owasp/esapi/errors/EncodingException.

[Guest]

Nevermind. I reread the directions for the patch and took further needed steps for this version and patch history. My advice to others: READ THE DIRECTIONS!

[Priyank Shrivastava.]

Hi,

Can you please roll back the Security patch and the reason is because you have missed some files  when you were applying the patch. So after you roll back check if the admin in working then re-apply the patch once again.

Regards,

Priyank