[Axis2] Issue with wsdl2java

Hi all,
I’m having issues with the wsdl2java.sh script.
I try to explain myself better:
Everytime I try to configure a wsp or wsse assertion tag in a policy in my services.xml I get a warning message that says for example

“org.apache.axis2.wsdl.codegen.extension.PolicyEvaluator - Cannot find a PolicyExtension to process (in my case) http://schemas.xmlsoap.org/ws/2004/09/policy type assertions”

I searched on the web lots of possible solutions but I can’t resolve my problem. Anyone can help me through this issue that I’m having or someone has ever had the same problem as me?
I don’t understand if this is a problem in the service or it is normal and I have to handle it in the client code.
Thanks for your attention and your time.
Best,
Samuele