Error 14 opening pdf file - Expected a dict object

Hi all, 

I'm getting an error opening a pdf in adobe reader. It just opens up blank without any data and zooming in and out produces below error.

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But same file opens fine in edge, chrome, firefox, foxit and nitro pdf.

This file is downloaded from .net app using File Result. Pdf Producer as seen in adobe reader file properties is Aspose.

My code to download file can be found in answer here

Please do let me know at earliest. Thanks in advance!