ValueError: invalid literal for int() with base 10: b'n'

[MartinThoma]

Traceback (most recent call last):
[...]
File "/home/math/.pyenv/versions/3.8.4/lib/python3.8/site-packages/edapy/pdf.py", line 55, in find
data.append(get_pdf_info(pdf_path))
File "/home/math/.pyenv/versions/3.8.4/lib/python3.8/site-packages/edapy/pdf.py", line 87, in get_pdf_info
pdf_toread = PdfFileReader(fp, strict=False)
File "/home/math/.pyenv/versions/3.8.4/lib/python3.8/site-packages/PyPDF2/pdf.py", line 1084, in init
self.read(stream)
File "/home/math/.pyenv/versions/3.8.4/lib/python3.8/site-packages/PyPDF2/pdf.py", line 1803, in read
idnum, generation = self.readObjectHeader(stream)
File "/home/math/.pyenv/versions/3.8.4/lib/python3.8/site-packages/PyPDF2/pdf.py", line 1667, in readObjectHeader
return int(idnum), int(generation)
ValueError: invalid literal for int() with base 10: b'n'