bsh.EvalError: java.util.concurrent.CompletionException:
    java.util.concurrent.CompletionException:
        java.lang.NullPointerException:
        Cannot invoke "bsh.BshClassManager$MemberCache.findMethod(
            String, java.lang.Class[]
        )" because the return value of
        "bsh.util.ReferenceCache.get(Object)" is null
        at <unknown location>
    at bsh.This.invokeMethod(This.java:323)
    at Grohe_Blue_Webcam.run(Unknown Source)
    at i8.bundle.action.ScheduledActionJob.execute(
        ScheduledActionJob.java:78
      )
    at org.quartz.core.JobRunShell.run(JobRunShell.java:203)
    at org.quartz.simpl.SimpleThreadPool$WorkerThread.run(
        SimpleThreadPool.java:566
      )

Caused by: java.util.concurrent.CompletionException:
    java.util.concurrent.CompletionException:
        java.util.concurrent.CompletionException:
            java.lang.NullPointerException:
            Cannot invoke "bsh.BshClassManager$MemberCache.findMethod(
                String, java.lang.Class[]
            )" because the return value of
            "bsh.util.ReferenceCache.get(Object)" is null
            at bsh.util.ReferenceCache.dereferenceValue(
                ReferenceCache.java:163
              )
            at bsh.util.ReferenceCache.get(ReferenceCache.java:88)
            at bsh.Reflect.resolveExpectedJavaField(
                Reflect.java:357
              )
            at bsh.Reflect.resolveJavaField(Reflect.java:340)
            at bsh.NameSpace.getImportedVar(NameSpace.java:934)
            at bsh.NameSpace.getVariableImpl(NameSpace.java:658)
            at bsh.NameSpace.getVariableImpl(NameSpace.java:661)
            at bsh.NameSpace.getVariable(NameSpace.java:639)
            at bsh.Name.resolveThisFieldReference(Name.java:572)
            at bsh.Name.consumeNextObjectField(Name.java:252)
            at bsh.Name.toObject(Name.java:195)
            at bsh.BSHAmbiguousName.toObject(
                BSHAmbiguousName.java:53
              )
            at bsh.BSHAmbiguousName.toObject(
                BSHAmbiguousName.java:44
              )
            at bsh.BSHPrimaryExpression.eval(
                BSHPrimaryExpression.java:115
              )
            at bsh.BSHPrimaryExpression.eval(
                BSHPrimaryExpression.java:67
              )
            at bsh.BSHUnaryExpression.eval(
                BSHUnaryExpression.java:53
              )
            at bsh.BSHAssignment.eval(BSHAssignment.java:40)
            at bsh.BSHIfStatement.evaluateCondition(
                BSHIfStatement.java:56
              )
            at bsh.BSHIfStatement.eval(BSHIfStatement.java:39)
            at bsh.BSHBlock.evalBlock(BSHBlock.java:161)