The file name is “BL_97859 1.pdf”, which not contains special characters.
The error is happening just with this specific pdf. Others documents are being read properly.
The Digitize of this specific document is returning this error:
Retry Scope - Digitize: Word contains invalid character: any waterborne
I think the document might have invalid characters inside its content, but I have never heard about errors in Digitization because of that.
To address this issue, you may want to try using a different OCR engine or digitization tool to see if it can successfully process the PDF file. Alternatively, you can try converting the PDF file to a different format, such as a Word document or a plain text file, and then using a different tool to digitize the content.