How to Fix 'This File Format Is Not Supported' Error When Opening PDFs

how to fix it This file format is not supported.Pdf file not open

pdf file not open,
pdf file not opening in mobile,
pdf file not opening,
pdf file not opening in adobe reader,
pdf file not open in whatsapp,
pdf file not open in mobile,
pdf file not open problem,
pdf file not open in file manager,
pdf file not open in chrome,
pdf file not opening in chrome android,
pdf files are not opening in whatsapp,
pdf file does not open in adobe reader

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