Smart light, Device configuration error

Hello All,
I am facing a problem with the " Full IoT product: smart light on Mongoose OS" tutorial. Till step 7 everything works fine but in step 8, at the last stage when I have to “Finish the registration” after setting up the home wifi id and password. It shows me this error.

I have tried multiple times but it always shows me the same error. Any suggestion on how to solve this issue?

Best Regards,