TCPDF_PARSER ERROR: Invalid object reference: Array

Context: smalot/pdfparser v0.9.25, tecnickcom/tcpdf 6.2.12, PHP 5.4.6.0; Windows 10 (64 x64).

Hi
We are unable to process any pdf file. We tested with the demo page (http://www.pdfparser.org/demo) and it parses OK. But when we try
$parser = new \Smalot\PdfParser\Parser();
$pdf = $parser->parseFile($pdf_file_path);
it always fails with the following error:
PHP Fatal error: Uncaught exception 'Exception' with message 'TCPDF_PARSER ERROR: Invalid object reference: Array' in T:\Projecto\PHP\PDF_parsing\PDFParser\vendor\tecnickcom\tcpdf\tcpdf_parser.php:807
Stack trace:
#0 T:\Projecto\PHP\PDF_parsing\PDFParser\vendor\tecnickcom\tcpdf\tcpdf_parser.php(680): TCPDF_PARSER->Error('Invalid object ...')
#1 T:\Projecto\PHP\PDF_parsing\PDFParser\vendor\tecnickcom\tcpdf\tcpdf_parser.php(286): TCPDF_PARSER->getIndirectObject('', '173', true)
#2 T:\Projecto\PHP\PDF_parsing\PDFParser\vendor\tecnickcom\tcpdf\tcpdf_parser.php(195): TCPDF_PARSER->decodeXrefStream('173', Array)
#3 T:\Projecto\PHP\PDF_parsing\PDFParser\vendor\tecnickcom\tcpdf\tcpdf_parser.php(117): TCPDF_PARSER->getXrefData()
#4 T:\Projecto\PHP\PDF_parsing\PDFParser\vendor\smalot\pdfparser\src\Smalot\PdfParser\Parser.php(88): TCPDF_PARSER->__construct('%PDF-1.3?%?????...')
#5 T:\Projecto\PHP\PDF_parsing\PDFParser\vendor\smalot\pdfparser\src\Smalot\PdfParser\Parser.php(74): Smalot\PdfParser\Parser->parseContent('%PDF-1.3?%?????...') in T:\Projecto\PHP\PDF_parsing\PDFParser\vendor\tecnickcom\tcpdf\tcpdf_parser.php on line 807

Could you help?
Thanks.

Start by reproducing the failure with the reported PHP, smalot/pdfparser, and TCPDF versions using the affected PDF; no PDF is attached, so obtaining a reproducible file is necessary. Read tcpdf_parser.php around lines 807, 680, 286, and 195, then follow the call from src/Smalot/PdfParser/Parser.php lines 74 and 88. Done means the affected PDF parses without the invalid object reference and the regression is covered by a test.