Some time ChatGPT is not retrieving information from the pdf those are encrypted and uploaded in the knowledge base of the custom GPT.
Out of interest, why would you expect this to work at all? How would “ChatGPT” know how to decrypt the data?
Welcome to the forum!
Can you expand on what exactly you mean by encrypted? Please show some examples of the noted encrypted data and why you think it is encrypted.
While some may think that PDFs are encrypted by looking at them as raw text what you may be thinking is not really encrypted by a Cryptographic algorithm.
Are you aware that portions of a PDF from which the text is generated is often PostScript or a variation of it?
Please see the PDF section of article.