[Python] VS code cannot import local python modules

All of my project files in VS code suddenly gives an error saying that it cannot import modules (even tho the modules are local i.e same directory and they used to work pretty well before). The code works fine in pycharm but not in VS code, any idea whats going on?

Code:
from backend.util.crypto_hash import crypto_hash
from backend.config import MINE_RATE

error:


env DEBUGPY_LAUNCHER_PORT=34625 /home/nikhil/python-blockchain/blockchain-env/bin/python /home/nikhil/.vscode/extensions/ms-python.python-2020.3.71659/pythonFiles/lib/python/debugpy/no_wheels/debugpy/launcher /home/nikhil/python-blockchain/backend/app/__init__.py
Traceback (most recent call last):
File "/home/nikhil/python-blockchain/backend/app/__init__.py", line 2, in <module>
from backend.blockchain.blockchain import Blockchain
ModuleNotFoundError: No module named 'backend'

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