Testing, cups update prevents printing

Hello,
I'm on Debian 5.10.13-1 ; I recently agreed to update a range of cups packages (versions below), and since then, no way to print.
I do see the printers on my network, I can create new ones and even print test pages, but once that is done, whenever I try a 'normal' print, nothing happens. This applies to both my two printers.
There is an utility that triggers and tries to solve the issue ('select your printer', etc.) but its log, below, is for me difficult to understand (server not starting at boot maybe?) -anyway, I see the following :
Code:Page 1 (<troubleshoot.SchedulerNotRunning.SchedulerNotRunning object at 0x7f1de37f7d60>):
{'cups_connection_failure': False}
Page 2 (<troubleshoot.ChoosePrinter.ChoosePrinter object at 0x7f1de37f7c10>):
{'cups_dest': <cups.Dest laser_Cannes_15Fev21>,
'cups_instance': None,
'cups_queue': 'laser_Cannes_15Fev21',
'cups_queue_listed': True}Any clue as to what is happening?
TIA!!
Herve

My cups versions :
https://i.imgur.com/tyLrx5K.png