Your reply prompted me to do this. I changed the date to dec 1 2022 manually on my pc and the watchfacestudio runs just fine 
This means nothing wrong with my pc or Java ??.
Because on 2023 automatic time watchfacstudio throws the above java error.
As soon as time is automatic updated when i open web browser even although i have set it to manual in my pc… The time automatically changes to 2023 and again watchface studio is frozen .