Exception in thread "main" java.lang.NullPointerException

[BA-AyushS]

I am attempting to create an APIGEE bundle from the WSDL file. I have uploaded the WSDL file in the SOAP UI software, so the WSDL file format is correct.

However, I encountered the following error while generating the APIGEE bundle:

Mar 19, 2024 6:55:27 PM com.apigee.proxywriter.GenerateProxy begin
SEVERE: null
Exception in thread "main" java.lang.NullPointerException
        at com.apigee.proxywriter.GenerateProxy.parseElement(GenerateProxy.java:1548)
        at com.apigee.proxywriter.GenerateProxy.parseSchema(GenerateProxy.java:1664)
        at com.apigee.proxywriter.GenerateProxy.parseElement(GenerateProxy.java:1563)
        at com.apigee.proxywriter.GenerateProxy.parseSchema(GenerateProxy.java:1664)
        at com.apigee.proxywriter.GenerateProxy.getOASDefinitions(GenerateProxy.java:2336)
        at com.apigee.proxywriter.GenerateProxy.generateOAS(GenerateProxy.java:2770)
        at com.apigee.proxywriter.GenerateProxy.begin(GenerateProxy.java:2900)
        at com.apigee.proxywriter.GenerateProxy.main(GenerateProxy.java:3215)

Can someone suggest what is happening and what should be done.