JavaVM: requested Java version ((null)) not available. Using Java at ""
instead.
JavaVM: Failed to load JVM: /bundle/Libraries/libserver.dylib
JavaVM FATAL: Failed to load the jvm library.
Error : .onLoad failed in loadNamespace() for 'extraTrees', details:
call: .jinit()
error: JNI_GetCreatedJavaVMs returned -1

Error: package or namespace load failed for ‘extraTrees’