java.lang.NullPointerException

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  • java.lang.NullPointerException: Attempt to invoke virtual method 'com.github.barteksc.pdfviewer.PDFView$Configurator com.github.barteksc.pdfviewer.PDFView.fromFile(java.io.File)' on a null object reference at com.appstrader.metro.the_engineer.ViewPDF$PlaceholderFragment$1$override.run(ViewPDF.java:384) at com.appstrader.metro.the_engineer.ViewPDF$PlaceholderFragment$1$override.access$dispatch(ViewPDF.java) at com.appstrader.metro.the_engineer.ViewPDF$PlaceholderFragment$1.run(ViewPDF.java:0) at java.lang.Thread.run(Thread.java:818)
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