FX8-3DFeatures.SpecularColorTestApp and FX8-3DFeatures.WritableMapTestApp are throwing below exception:

java.lang.NullPointerException: Cannot invoke "com.sun.prism.Texture.lock()" because "altTex" is null
    at javafx.graphics@21-internal/com.sun.prism.impl.BaseTexture.getSharedTexture(BaseTexture.java:215)
    at javafx.graphics@21-internal/com.sun.prism.impl.BaseResourceFactory.getCachedTexture(BaseResourceFactory.java:213)
    at javafx.graphics@21-internal/com.sun.prism.impl.BaseResourceFactory.getCachedTexture(BaseResourceFactory.java:170)
    at javafx.graphics@21-internal/com.sun.javafx.sg.prism.NGImageView.renderContent(NGImageView.java:121)
    at javafx.graphics@21-internal/com.sun.javafx.sg.prism.CacheFilter.renderNodeToCache(CacheFilter.java:687)
    at javafx.graphics@21-internal/com.sun.javafx.sg.prism.CacheFilter.render(CacheFilter.java:587)
    at javafx.graphics@21-internal/com.sun.javafx.sg.prism.NGNode.renderCached(NGNode.java:2379)
    at javafx.graphics@21-internal/com.sun.javafx.sg.prism.NGNode.doRender(NGNode.java:2065)
    at javafx.graphics@21-internal/com.sun.javafx.sg.prism.NGImageView.doRender(NGImageView.java:103)
    at javafx.graphics@21-internal/com.sun.javafx.sg.prism.NGNode.render(NGNode.java:1966)
    at javafx.graphics@21-internal/com.sun.javafx.sg.prism.NGGroup.renderContent(NGGroup.java:270)
    at javafx.graphics@21-internal/com.sun.javafx.sg.prism.NGRegion.renderContent(NGRegion.java:579)
    at javafx.graphics@21-internal/com.sun.javafx.sg.prism.NGNode.doRender(NGNode.java:2074)
    at javafx.graphics@21-internal/com.sun.javafx.sg.prism.NGNode.render(NGNode.java:1966)
    at javafx.graphics@21-internal/com.sun.javafx.sg.prism.NGGroup.renderContent(NGGroup.java:270)
    at javafx.graphics@21-internal/com.sun.javafx.sg.prism.NGRegion.renderContent(NGRegion.java:579)
    at javafx.graphics@21-internal/com.sun.javafx.sg.prism.NGNode.doRender(NGNode.java:2074)
    at javafx.graphics@21-internal/com.sun.javafx.sg.prism.NGNode.render(NGNode.java:1966)
    at javafx.graphics@21-internal/com.sun.javafx.sg.prism.NGGroup.renderContent(NGGroup.java:270)
    at javafx.graphics@21-internal/com.sun.javafx.sg.prism.NGRegion.renderContent(NGRegion.java:579)
    at javafx.graphics@21-internal/com.sun.javafx.sg.prism.NGNode.doRender(NGNode.java:2074)
    at javafx.graphics@21-internal/com.sun.javafx.sg.prism.NGNode.render(NGNode.java:1966)
    at javafx.graphics@21-internal/com.sun.javafx.tk.quantum.ViewPainter.doPaint(ViewPainter.java:480)
    at javafx.graphics@21-internal/com.sun.javafx.tk.quantum.ViewPainter.paintImpl(ViewPainter.java:329)
    at javafx.graphics@21-internal/com.sun.javafx.tk.quantum.UploadingPainter.run(UploadingPainter.java:156)
    at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:539)
    at java.base/java.util.concurrent.FutureTask.runAndReset(FutureTask.java:305)
    at javafx.graphics@21-internal/com.sun.javafx.tk.RenderJob.run(RenderJob.java:58)
    at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
    at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
    at javafx.graphics@21-internal/com.sun.javafx.tk.quantum.QuantumRenderer$PipelineRunnable.run(QuantumRenderer.java:126)
    at java.base/java.lang.Thread.run(Thread.java:833)