I get an error when I try to use the function "convert_to_pdf".

[hoaile-novobi]

Hi admin, please help to find out what happen with my PDF file, my file is a form format PDF and i would like to convert it to flatten format so i use the "convert_to_pdf" function, but it throw an error RuntimeError('substitute font creation is not implemented yet')

Here is my code:

attachment = base64.b64encode(image_file.read())
pdf_file = fitz.open("pdf", base64.b64decode(attachment))
pdf_bytes = pdf_file.convert_to_pdf()

My PDF: https://drive.google.com/file/d/18D-Kn2cRWE_dLRItNgOb4N_ys5CUA-X6/view?usp=sharing
Please help.

[JorjMcKie]

This is not a bug, but simply not supported. There are limitations WRT font support.
Similarly, Type3 fonts are also not supported.

[hoaile-novobi]

Do you have any idea for the issue? How can i resolve this case?