Error in opening pptx

[kannangce]

I was trying to open a valid pptx. I cloned the repo and replaced the demo.pptx with the pptx that I have. When I opened the demos.html, I'm getting the below error in my console.

pptxjs.js:7256 Uncaught TypeError: Cannot read property 'slideMasterTextStyles' of undefined
at genTextBody (pptxjs.js:7256)
at genTable (pptxjs.js:7825)
at processGraphicFrameNode (pptxjs.js:7217)
at processNodesInSlide (pptxjs.js:621)
at processSingleSlide (pptxjs.js:540)
at processPPTX (pptxjs.js:306)
at convertToHtml (pptxjs.js:177)
at Object.load (pptxjs.js:142)
at FileReader.reader. (filereader.js:369)

The pptx that I've is valid and openable with microsoft powerpoint.

[meshesha]

Thank you for your comment.
I'll work on that.
You can link to demo.pptx. This will help me understand the cause of the problem