This exception I have also seen during startup…
I replied into the wrong thread but I reverted the logging change.
Ok, thanks. It’s a bit strange as the only change was to change the loggers, but if it resolved it, then fine. The new binding can resolve this issue…
Hello @chris
thank you a lot for your responsiveness and help even during the holidays. Unfortunately I somehow managed to mess up all (so my RFXtrx433E devices were also gone) and I ended up to do a fresh install of OpenHAB on my Pi.
Nevertheless, a lesson learned is not do do every update, but rather pack it in a script that does a backup of /etc/openhab2 /usr/share/openhab2 and /var/lib/openhab2 before apt upgrade so in case this happens a revert should be easily doable. 
Hi
I can also confirm that most of my devices are working again.
But I have 3 devices that are unkinown, but they also didnt work before so I will open a new thread for those issues.
Thanks a lot @chris for your support over the holidays…
Just as follow up @chris,
everything is working fine after a fresh installation. All devices have come online (took about a day to have all devices recognized by OpenHAB again) and I can use OpenHAB as before.
Thanks again for your support!