SpRL testing problem

[WANXIN CAI]

While using the SpRL examples, I'm facing the problem of Unable to extract features for SRLMulticlassInstance, I don't understand why such thing happened.

[info] INFO [2017-06-29 01:30:24,774] e.i.c.c.s.i.c.CrossArgumentRetainedModifiers: Loading allowed cross-argument modifier arguments from Verb.cross-predicate.modifiers
[info] ojAlgo includes a small set of predefined hardware profiles,
[info] none of which were deemed suitable for the hardware you're currently using.
[info] You should set org.ojalgo.OjAlgoUtils.ENVIRONMENT to something that matches the hardware/OS/JVM you're running on.
[info] Additionally it would be appreciated if you contribute your hardware profile to ojAlgo.
[info] https://lists.sourceforge.net/lists/listinfo/ojalgo-user
[error] java.lang.NullPointerException
[error] at edu.illinois.cs.cogcomp.core.datastructures.textannotation.SymbolTable.getId(SymbolTable.java:44)
[error] at edu.illinois.cs.cogcomp.core.datastructures.textannotation.Constituent.(Constituent.java:86)
[error] at edu.illinois.cs.cogcomp.core.datastructures.textannotation.Constituent.(Constituent.java:63)
[error] at edu.illinois.cs.cogcomp.core.datastructures.textannotation.Constituent.cloneForNewView(Constituent.java:503)
[error] at edu.illinois.cs.cogcomp.srl.features.ProjectedPath.getFeatures(ProjectedPath.java:36)
[error] at edu.illinois.cs.cogcomp.edison.features.FeatureCollection.getFeatures(FeatureCollection.java:93)
[error] at edu.illinois.cs.cogcomp.edison.features.FeatureCollection.getFeatures(FeatureCollection.java:70)
[error] at edu.illinois.cs.cogcomp.edison.features.CachedFeatureCollection.getFeatures(CachedFeatureCollection.java:42)
[error] at edu.illinois.cs.cogcomp.edison.features.FeatureCollection.getFeatures(FeatureCollection.java:93)
[error] at edu.illinois.cs.cogcomp.edison.features.FeatureCollection.getFeatures(FeatureCollection.java:70)
[error] at edu.illinois.cs.cogcomp.edison.features.CachedFeatureCollection.getFeatures(CachedFeatureCollection.java:42)
[info] ERROR [2017-06-29 01:32:00,041] e.i.c.c.s.l.SRLPredicateInstance: Unable to extract features for SRLMulticlassInstance [cand=the, predicate=leave]
[info] java.lang.NullPointerException: null