No module named 'flask'

[Acutapugione]

/usr/share/passenger/helper-scripts/wsgi-loader.py:26: DeprecationWarning: the imp module is deprecated in favour of importlib; see the module's documentation for alternative uses import sys, os, re, imp, threading, signal, traceback, socket, select, struct, logging, errno Traceback (most recent call last): File "/usr/share/passenger/helper-scripts/wsgi-loader.py", line 369, in app_module = load_app() File "/usr/share/passenger/helper-scripts/wsgi-loader.py", line 76, in load_app return imp.load_source('passenger_wsgi', startup_file) File "/usr/lib/python3.9/imp.py", line 171, in load_source module = _load(spec) File "", line 711, in _load File "", line 680, in _load_unlocked File "", line 855, in exec_module File "", line 228, in _call_with_frames_removed File "/var/www/power_flask/powerhome_flask/passenger_wsgi.py", line 1, in from app import app as application File "/var/www/power_flask/powerhome_flask/app/init.py", line 3, in from flask import Flask ModuleNotFoundError: No module named 'flask'