@louisewedderburn
there are only 2 temporary actions for now:
1) uninstall KB5000803/KB5000802 , and change windows settings to ASK before install updates.
2) install dymo software v. 8.5.4 as described here: dymo
seems that microsoft yesterday has released KB5001567 to fix the problem.
KB5001567
I installed it, but from a first test I still get blank labels… I will dedicate some time to do further tests in the next few days.