Unable to Print in FileMaker Pro 18 Advanced under Catalina, message "Change the custom paper size to the correct value, or use Scale to fit"

As of macOS Catalina upgrade, although I am able to see the Print dialog box, I get this error when I try to click the "Print" button: Unable to Print in FileMaker Pro 18 Advanced under Catalina, gets error message "Change the custom paper size to the correct value, or use Scale to fit paper size", ***although "Scale to fit paper size" is already selected*** Filemaker 18.0.3.317 I am trying to print to a Borther HL-L2300D laser printer and I am running on Mac OS Catalina 10.15.4 2020-05-13 Note; this only happens for me in one file. it happens to be my recipes (for real!) recipes.fmp12