Printer won't connect to WPS on Time Capsule
I've got a new Samsung M2825DW printer, which claims to be AirPrint enabled and has a WPS button on top. I've launched Airport Utility, selected my Time Capsule, selected Add WPS Printer, pressed the printer's WPS button. It's little light flashes on, and then... nothing. Airport Utility waits forever and picks up nothing.
I've tried many times. What could I be doing wrong?
Machine is a 2015 MacBook pro running 10.13.4; my 3 TB Time Capsule is about 3 years old and is "version 7.7.9".
Time Capsule 3TB-OTHER, Firmware version 7.7.9