29.7.1 macOS - PDF Export- Critical Parser failure: Unknown character in content stream
In the macOS version of Adobe Illustrator 29.7.1, there is indeed a critical bug. When exporting files containing a large amount of text that has been converted to outlines, the resulting PDF file becomes corrupted.
To verify the issue, please follow the steps below using the attached file:
1. Launch Adobe Illustrator on macOS (I use Sequoia 15.6)
2. Open the attached .ai file
3. Export the file as a PDF using the “High Quality Print” preset
Result: The exported PDF will appear corrupted, just like the attached example. Furthermore, when attempting to open the PDF in Acrobat Pro, the following error is displayed:
Critical Parser failure: Unknown character in content stream.
This issue does not occur on the Windows version of Illustrator. Could one of you confirm this bug? If this is indeed a reproducible problem, the development team should fix it as soon as possible.

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Indeed it doesn’t happen on Windows for me. The exported PDF gets opened fine, with no error.
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Kürşad Çakır commented
Since I couldn’t attach the files to the original email, I had to add them here.