Problem with library signing

I have added the JAR files to my eclipse project and am getting the following error:

SecurityException: Signers of 'com.aspose.pdf.internal.l72v.$Proxy88' do not match signers of other classes in package

How can I resolve this?

@SteveHawes

Would you kindly share the JDK version you are using.

Hi,

My Java info is:
JVM Information
java.vm.name=Eclipse OpenJ9 VM
java.version=12.0.1
java.vm.info=JRE 12 Mac OS X amd64-64-Bit Compressed References 20190418_59 (JIT enabled, AOT enabled) OpenJ9 - 412258978 OMR - 4a4278e6 JCL - 9fad1c64af based on jdk-12.0.1+12
java.vm.vendor=Eclipse OpenJ9

@SteveHawes

The API supports Java version upto 11. Would you kindly try to use API with Java 11 environment and in case you still face any issue, please feel free to let us know. As far as Java 12 support is concerned, we have logged a feature request as PDFJAVA-38947 in our issue tracking system for the sake of implementation. We will surely inform you as soon as the support is added. Please spare us little time.

We are sorry for the inconvenience.