Nucelo L432KC freeze

that indicates that mbed_app.json is not a valid json file, so there must be some mistake like missing ‘,’ or bracket error.
In the documentation, you’ll find which API can be used in bare-metal, but its a teddious work to find all the requriments. I looked up in the source mbed_lib.json files, or is there a smarter way?

https://os.mbed.com/docs/mbed-os/v6.1/apis/index.html