After upgrading Ubuntu 20.04.4LTS to 22.04.1LTS, pgAdmin4 doesn't work. Please help me to solve this problem, there are several similar topics, none helped. I'm a beginner in using Ubuntu, maybe I did something wrong.
The pgAdmin 4 server could not be contacted:
Total spawn time to start the pgAdmin4 server: 0.004 Sec
Traceback (most recent call last):
File "/usr/pgadmin4/web/pgAdmin4.py", line 38, in <module>
import config
File "/usr/pgadmin4/web/config.py", line 25, in <module>
from pgadmin.utils import env, IS_WIN, fs_short_path
File "/usr/pgadmin4/web/pgadmin/__init__.py", line 23, in <module>
from flask import Flask, abort, request, current_app, session, url_for
File "/usr/pgadmin4/venv/lib/python3.8/site-packages/flask/__init__.py", line 1, in <module>
from markupsafe import escape
File "/usr/pgadmin4/venv/lib/python3.8/site-packages/markupsafe/__init__.py", line 4, in <module>
import typing as t
ModuleNotFoundError: No module named 'typing'