Comment 10 for bug 1813432

To remove the setting:

lpadmin -p duplex -R pdftops-renderer-default

See /usr/share/doc/cups-filters/README.gz section "POSTSCRIPT PRINTING RENDERER AND RESOLUTION SELECTION" for more information.

The standard selection is "hybrid", meaning that Ghostscript is used in most cases and Poppler (/usr/bin/pdftops) for printers which are known to be not compatible with Ghostscript's output. According to your error_log in your case Poppler got selected. I want to find out now whether this decision is perhaps not good for your printer so that I can modify it.