Hello, I have exactly same problem since the day before yesterday.
I have 3 Bosch appliances (a Dishwasher, a Washing machine and a Dryer) connected to Openhab, and after upgrading OH to 5.1.1 all three got offline. Restart of OH itself didn’t help. Then, yesterday, I have restarted the binding itself via bundle:stop → bundle:start, and the Dishwasher and Dryer came online. But now the Dishwasher is online, but stuck at 17% of the progress since yesterday evening. The Washing machine is till offline..
In the original Bosch HC app everything is fine. I’m getting exacly this error and messages in the OH logs.