Hi David, nice to see you around 
do you mean the preferences setting in the paperui?
ore the settings in the linux system?
then i will change it to english, this should not be the problem.
currently i use the docker version, and there i see LANG and LC_ALL is de_AT.UTF-8.
thank you very much for this info, now its working again, i have changed all settings in docker to en_US.UTF-8 
it is now wokring with this scribt, but with this it is not possible to step in 0.5.
Now i have tried with formatBeforePublish=“%.1f” and see there, this is working great now, all my thermostats are working again with the latest version 