404 error when calling artifactory.security() or artifactory.system()

I am working on creating a jenkins script, that can access artifactory Rest API (version: 7.84.17)
Following examples from README, when I make rest calls like:

 ArtifactoryRequest repositoryRequest = new ArtifactoryRequestImpl().apiUrl("access/api/v1/tokens")
        .method(ArtifactoryRequest.Method.GET)
        .responseType(ArtifactoryRequest.ContentType.JSON);
ArtifactoryResponse response = artifactory.restCall(repositoryRequest);
println response.getRawBody()

I get expected response, but when I try to access anything via artifactory.security() or artifactory.system() it always gives me

org.apache.http.client.HttpResponseException: status code: 404, reason phrase: 404 page not found

	at org.jfrog.artifactory.client.impl.ArtifactoryImpl.newHttpResponseException(ArtifactoryImpl.java:257)
	at org.jfrog.artifactory.client.impl.ArtifactoryImpl.get(ArtifactoryImpl.java:287)
	at org.jfrog.artifactory.client.impl.ArtifactoryImpl.get(ArtifactoryImpl.java:270)
	at org.jfrog.artifactory.client.Artifactory$get$0.call(Unknown Source)
	at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:47)
	at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:116)
	at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:144)
	at org.jfrog.artifactory.client.impl.SecurityImpl.userNames(SecurityImpl.groovy:41)
	at org.jfrog.artifactory.client.Security$userNames.call(Unknown Source)
	at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:47)
	at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:116)
	at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:120)
	at Script1.run(Script1.groovy:14)

Even system().ping() system().version().getVersion() isn't working.
I have tried admin scope token and even admin's identity token but its same result.
Can someone please help?

Start by reproducing the failing security() and system() calls against Artifactory 7.84.17, then inspect ArtifactoryImpl.java around the reported lines and SecurityImpl.groovy:41. Compare those request paths with the working access/api/v1/tokens example. Done means the affected calls no longer return 404 and their existing behavior is covered by an appropriate test.