Fatal error: Uncaught setasign\Fpdi\PdfParser\PdfParserException: Unable to find PDF file header. in /usr/share/nginx/pennine/fdpi/PdfParser/PdfParser.php:131
Stack trace:
#0 /usr/share/nginx/pennine/fdpi/PdfParser/PdfParser.php(172): setasign\Fpdi\PdfParser\PdfParser->resolveFileHeader()
#1 /usr/share/nginx/pennine/fdpi/PdfReader/PdfReader.php(84): setasign\Fpdi\PdfParser\PdfParser->getPdfVersion()
#2 /usr/share/nginx/pennine/fdpi/FpdiTrait.php(237): setasign\Fpdi\PdfReader\PdfReader->getPdfVersion()
#3 /usr/share/nginx/pennine/fdpi/FpdiTrait.php(216): setasign\Fpdi\Fpdi->setSourceFileWithParserParams(Object(setasign\Fpdi\PdfParser\StreamReader))
#4 /usr/share/nginx/pennine/pdffilesample.php(26): setasign\Fpdi\Fpdi->setSourceFile(Object(setasign\Fpdi\PdfParser\StreamReader))
#5 {main}
  thrown in /usr/share/nginx/pennine/fdpi/PdfParser/PdfParser.php on line 131