I'm trying to set the background fill color for a pptx file using the Apache POI XSLF library. My code looks like this:
XSLFSlideMaster defaultMaster = ppt.getSlideMasters().get(0);
XSLFSlideLayout layout = defaultMaster.getLayout(SlideLayout.BLANK);
XSLFBackground background = layout.getBackground();
background.setFillColor(Color.BLACK);
which results in
Exception in thread "main" java.lang.IllegalStateException: CTShapeProperties was not found.
at org.apache.poi.xslf.usermodel.XSLFShape.getSpPr(XSLFShape.java:240)
at org.apache.poi.xslf.usermodel.XSLFSimpleShape.setFillColor(XSLFSimpleShape.java:549)
I've tried calling this on SlideMaster's background, the layout's background, and the slide's background and all result in the same error.