Script not starting

Hello,
I am not sure how much backstory you need to asses the situation. So I try to give all seemingly relevant information.
I bought my BrewPi Spark v2 in June 2016 and used it until last year, now after moving I am setting everything up again. During the setup I decided to update my Raspi and BrewPi. Thereafter I could not access the BrewPi anymore (white/gray screen). After reading a while in the documentation and forum I decided to give the WiFi setup on the BrewPi a try and it became alive again. But I could not access it via “IP:6666” from my Raspi. So I used USB connection again with “port = auto” in the config.cfg. And I could access the BrewPi a little.
Which enabled the maintenance panel in the WebUI. So I set up the 3 temperature sensors and the two actuators. Which seamed to work, tough I could not switch them on/off in test mode, but the temperatures were displayed on the BrewPi. In the advanced panel I can also change the mode but as soon as I try to setup the fridge temperature in “fridge constant” mode the LCD displays says “Script starting up” in the top right corner it says “script running” but the BrewPi does not display the set temperature and is not switching anything.
When I push the “apply” Button in the fridge constant mode I receive in the maintenance log stderr:
Mar 25 2020 11:52:58 Fresh start! Log files erased.
Mar 25 2020 11:53:03 Controller debug message: WARNING 1: Invalid command received by controller: l
Traceback (most recent call last):
File “/home/brewpi/brewpi.py”, line 527, in
if cc[‘tempSetMin’] <= newTemp <= cc[‘tempSetMax’]:
KeyError: ‘tempSetMin’

Keeping it running for a while I receive multiple errors:
Mar 25 2020 12:05:44 Controller debug message: WARNING 1: Invalid command received by controller: l
Mar 25 2020 12:05:49 Controller debug message: WARNING 1: Invalid command received by controller: l
Mar 25 2020 12:05:54 Controller debug message: WARNING 1: Invalid command received by controller: l
Mar 25 2020 12:05:59 Controller debug message: WARNING 1: Invalid command received by controller: l
Mar 25 2020 12:06:04 Controller debug message: WARNING 1: Invalid command received by controller: l

I would appreciate any hint or help since I am no programmer I feel not confident to enter the python script.
Best Regards
marcon

Instead of fixing your BrewPi install, I recommend doing a fresh install of Brewblox, its successor.

The process is described at https://brewblox.netlify.com.

Dear Elco,
many thanks I was unsure about this topic since the BrewPi homepage (https://www.brewpi.com/) still points to https://wiki.brewpi.com/ in the section Documentation/Software Installation. Would be good to also point there to the brewblox.
I will try to follow the documentation and learn a lot of new things in the next days.
Thank you for your support!