Multiple Errors Encounter at Runtime

[jacktheking2010]

Trying to replicate the experiment, follow your instructions but the following errors are thrown by the browser as well as python and react:
Error 1: Access to fetch at 'http://192.168.43.77:8002/test' from origin 'http://localhost:3000' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource. If an opaque response serves your needs, set the request's mode to 'no-cors' to fetch the resource with CORS disabled. (Can be temporarily solved by extension but than JSON error POST http://192.168.43.77:8002/test 500 (INTERNAL SERVER ERROR) and Uncaught (in promise) SyntaxError: Unexpected token < in JSON at position 0 is thrown)
Error 2: On the python side list index out of range error is thrown.
Kindly help me to run this project locally by give me detail description if possible.

Error 2: