Tuya smart app - JSON unexpected number

Hello,

I have connected Tyua cloud app via IoT platform. Everything was ok and I was able to control all connected devices in the Homey app.

But I had to reconnect 2 devices (WiFi led lights) and from that moment I am not able to control them. There is a message “Unexpected number in JSON at position 1”. Can you help me what I should do / change please?