This is due to the fact that the React native console logger CANNOT parse the JSON object coming from Axios.
I can guarantee that anyone who is having this error is not PARSING the JSON object before logging it to the console.
CODE THAT WILL GIVE THIS ERROR:
Axios.post(URL).then(function (response)
{
console.log("POST RESPONSE: "+response);
}
CODE THAT FIXES THIS ERROR:
Axios.post(URL).then(function (response)
{
console.log("POST RESPONSE: "+JSON.stringify(response));
}