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Fatal error: Uncaught exception 'setasign\Fpdi\PdfParser\PdfParserException' with message 'Unable to find PDF file header.' in /opt/lampp/htdocs/cfapp_pdf/fpdi/src/PdfParser/PdfParser.php:130 Stack trace: #0 /opt/lampp/htdocs/cfapp_pdf/fpdi/src/PdfParser/PdfParser.php(171): setasign\Fpdi\PdfParser\PdfParser->resolveFileHeader() #1 /opt/lampp/htdocs/cfapp_pdf/fpdi/src/PdfReader/PdfReader.php(85): setasign\Fpdi\PdfParser\PdfParser->getPdfVersion() #2 /opt/lampp/htdocs/cfapp_pdf/fpdi/src/FpdiTrait.php(188): setasign\Fpdi\PdfReader\PdfReader->getPdfVersion() #3 /opt/lampp/htdocs/cfapp_pdf/run_v2.php(31): setasign\Fpdi\Fpdi->setSourceFile('tmp1.pdf') #4 {main} thrown in /opt/lampp/htdocs/cfapp_pdf/fpdi/src/PdfParser/PdfParser.php on line 130