Comment 7 for bug 1816226

Thank you for the links. Printing now works, my next problem is scanning. ;)
I found useful information in your link https://wiki.debian.org/QuickPrintQueuesCUPS
It says that for scanning, installing libsane-hpaio should be sufficient.
I installed the package but scanning still does not work (scanimage -L do not report any scanner).

  journalctl -f

shows two lines

  scanimage[15408]: io/hpmud/model.c 532: no colorlaserjet_mfp_m278-m281 attributes found in /usr/share/hplip/data/models/models.dat
  scanimage[15408]: io/hpmud/model.c 543: no colorlaserjet_mfp_m278-m281 attributes found in /usr/share/hplip/data/models/unreleased/unreleased.dat

The first file exists, the second does not.

I tried to be clever and duplicated the entry of hp_color_laserjet_mfp_m277dw in the first file and rename it to colorlaserjet_mfp_m278-m281. Now scanimage -L reports a scanner.

But xsane reports "Failed to open device `hpaio:/net/colorlaserjet_mfp_m278-m281?ip=192.168.0.88&queue=false': Error during device I/O.". So probably the models are not compatible.