Error 4059

I create multi keyboard and test it ok. When I back last time their was Error: 4059 Invalid JSON at offset 0”
I didn’t understood why and whats mean and how can I fix it Preformatted text

Welcome to the community, @ralfareh.

I can help and look into this if you could DM me the source folder of the keyboard.

What’s helpful for me when working with JSON file is to validate it using https://jsonlint.com.

thank you i undrstand how i can check it