How to solve error loading credentials Syntax Error Unexpected token in JSON at position 0 in Node-RED

To solve the problem

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[warn] Error loading credentials: SyntaxError: Unexpected token in JSON at position 0

that in fact blocks refreshing information on the Ulanzi’s TC001 Smart Pixel Clock screen, you have to follow the below steps. Of course if you are using a standalone Node-RED instance instaed of the Home Assistant Addon you can just login to your instance and perform mentioned commands.

Install SSH addon in Home Assistant
Use the below commands one by one to fix the problem:

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find / -name "*nodered*"
# Bear in mind that the string after the underscore can be different than the provided one
cd /addon_config/a0d7b954_nodered/
cat .config.runtime.json
mv .config.runtime.json .bla.config.runtime.json.bak

Restart the Node-RED
Provide MQTT broker user and password in the MQTT connection in each flow or provide a user and a password for the Ulanzi’s TC001 web GUI panel (some flows are connecting directly to Ulanzi’s device using IP address).
Deploy
Problem solved