Unhandled Runtime Error  SyntaxError: JSON.parse: unexpected character at line 1 column 1 of the JSON data


![image](https://github.com/user-attachments/assets/bbf5f202-5378-4ad1-8eab-4ec4b1358e96)

source code:

i don't know what im doing wrong. is it the serialization? is it the json file?

https://github.com/parsany/nextjscourse-invalidjson


thanks in advance!