Model crashes in AnyLogic - anylogic

Question

All I added was a few sliders, and now my model seems to be crashing for now reason after 10 simulated days. I am not using any animations or visual representations of my agents.
Error while drawing animation frame.
Possibly caused by dynamic properties of animation shapes.
The picture will be restored when (and if) the error goes away.
Error during model destruction:
NullPointerException
java.lang.NullPointerException
at com.anylogic.engine.presentation.ShapeEmbeddedObjectIcon.resetSVGState(Unknown Source)
at com.anylogic.engine.presentation.ShapeGroup.resetSVGState(Unknown Source)
at com.anylogic.engine.presentation.Shape.removeSVGImage(Unknown Source)
at com.anylogic.engine.gui.SVGFrameProducer.n(Unknown Source)
at com.anylogic.engine.gui.ExperimentHost.n(Unknown Source)
at com.anylogic.engine.gui.ExperimentHost.setPresentable(Unknown Source)
at com.anylogic.engine.gui.ExperimentHost.onAgentDestroyed_xjal(Unknown Source)
at com.anylogic.engine.Agent.onDestroy(Unknown Source)
at ae.Main.onDestroy(Main.java:3535)
at com.anylogic.engine.Engine.n(Unknown Source)
at com.anylogic.engine.Engine.stop(Unknown Source)
at com.anylogic.engine.ExperimentSimulation.stop(Unknown Source)
at com.anylogic.engine.gui.ExperimentHost.executeCommand(Unknown Source)
at com.anylogic.engine.internal.webserver.e.onCommand(Unknown Source)
at com.anylogic.executor.basic.rest.BasicAnimationSessionController.lambda$null$9(BasicAnimationSessionController.java:112)
at com.anylogic.engine.internal.webserver.i.acceptToAnimationSvgSession(Unknown Source)
at com.anylogic.executor.basic.rest.BasicAnimationSessionController.lambda$startController$10(BasicAnimationSessionController.java:112)
at spark.ResponseTransformerRouteImpl$1.handle(ResponseTransformerRouteImpl.java:47)
at spark.http.matching.Routes.execute(Routes.java:61)
at spark.http.matching.MatcherFilter.doFilter(MatcherFilter.java:130)
at com.anylogic.engine.internal.webserver.config.ALServerFactory$1.lambda$0(Unknown Source)
at org.eclipse.jetty.servlets.QoSFilter.doFilter(QoSFilter.java:201)
at com.anylogic.engine.internal.webserver.config.ALServerFactory$1.doHandle(Unknown Source)
at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:1568)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)
at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132)
at org.eclipse.jetty.server.Server.handle(Server.java:530)
at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:347)
at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:256)
at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:279)
at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:102)
at org.eclipse.jetty.io.ChannelEndPoint$2.run(ChannelEndPoint.java:124)
at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.doProduce(EatWhatYouKill.java:247)
at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.produce(EatWhatYouKill.java:140)
at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.run(EatWhatYouKill.java:131)
at org.eclipse.jetty.util.thread.ReservedThreadExecutor$ReservedThread.run(ReservedThreadExecutor.java:382)
at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:708)
at org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:626)
at java.base/java.lang.Thread.run(Thread.java:834)
Error during drawing animation frame:
java.lang.NullPointerException
at com.anylogic.engine.FlowchartMappedPort.count(Unknown Source)
at com.anylogic.libraries.processmodeling.Queue.a(Unknown Source)
at com.anylogic.libraries.processmodeling.Queue.a(Unknown Source)
at com.anylogic.libraries.processmodeling.Queue$3.updateDynamicProperties(Unknown Source)
at com.anylogic.engine.presentation.Shape.updateDynamicPropertiesStructural(Unknown Source)
at com.anylogic.engine.presentation.ShapeGroup.updateDynamicPropertiesStructural(Unknown Source)
at com.anylogic.engine.presentation.ShapeGroup.updateDynamicPropertiesStructural(Unknown Source)
at com.anylogic.engine.presentation.ShapeGroup.updateDynamicPropertiesStructural(Unknown Source)
at com.anylogic.engine.presentation.ShapeEmbeddedObjectIcon.updateDynamicPropertiesStructural(Unknown Source)
at com.anylogic.engine.presentation.ShapeGroup.updateDynamicPropertiesStructural(Unknown Source)
at com.anylogic.engine.Presentable.n(Unknown Source)
at com.anylogic.engine.Presentable.updateShapeDynamicProperties(Unknown Source)
at com.anylogic.engine.gui.SVGFrameProducer.n(Unknown Source)
at com.anylogic.engine.gui.ExperimentHost$1.l(Unknown Source)
at com.anylogic.engine.gui.ExperimentHost$1.n(Unknown Source)
at com.anylogic.engine.gui.SVGFrameCollector.l(Unknown Source)
at com.anylogic.engine.gui.SVGFrameCollector.c(Unknown Source)
at java.base/java.lang.Thread.run(Thread.java:834)