Problem with Dynamic attach

Start at com.singularity.ee.agent.appagent.AgentEntryPoint.main, reported at AgentEntryPoint.java:1127, and trace the Dynamic attach path that calls the Java Attach API. Reproduce the error while monitoring a Java process and inspect why the AttachProvider is unavailable; done means identifying a supported cause and documenting or validating the resulting fix.

(Sorry about the stupid title...)
I just used it today. thanks.
Trying to monitor my java processes, got many messages similar to:
Dynamic attach successful
Attaching to VM [1]
▒java.util.ServiceConfigurationError: com.sun.tools.attach.spi.AttachProvider: Provider sun.tools.attach.LinuxAttachProvider not found
v at java.base/java.util.ServiceLoader.fail(ServiceLoader.java:588)
at java.base/java.util.ServiceLoader$LazyClassPathLookupIterator.nextProviderClass(ServiceLoader.java:1211)
at java.base/java.util.ServiceLoader$LazyClassPathLookupIterator.hasNextService(ServiceLoader.java:1220)
at java.base/java.util.ServiceLoader$LazyClassPathLookupIterator.hasNext(ServiceLoader.java:1264)
at java.base/java.util.ServiceLoader$2.hasNext(ServiceLoader.java:1299)
at java.base/java.util.ServiceLoader$3.hasNext(ServiceLoader.java:1384)
at jdk.attach/com.sun.tools.attach.spi.AttachProvider.providers(AttachProvider.java:258)
at jdk.attach/com.sun.tools.attach.VirtualMachine.attach(VirtualMachine.java:200)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:566)
at com.singularity.ee.agent.appagent.AgentEntryPoint.main(AgentEntryPoint.java:1127)
0agent path >>>/opt/AppServerAgent/javaagent.jar
<WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by com.singularity.ee.agent.appagent.AgentEntryPoint (file:/opt/AppServerAgent/javaagent.jar) to method sun.tools.attach.HotSpotVirtualMachine.loadAgent(java.lang.String,java.lang.String)
WARNING: Please consider reporting this to the maintainers of com.singularity.ee.agent.appagent.AgentEntryPoint
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release

Any idea why?

Thanks!
Asaf