This error message can also appear when trying to print to a PDF printer, although the error code will most likely read "Printer not activated error code -30 PDF or 20 PDF" in this case. Sage 50 printer not activated happen when the default printer is not set are there are no permission etc.
https://cfi-blog.org/2021/10/14/fix-sage-50-printer-not-activated-error-code-30/