not abale to excute command

[MrExploit201]

when i run the command then i get this error

Traceback (most recent call last):
File "/opt/nginxpwner/nginxpwner.py", line 3, in
from bs4 import BeautifulSoup
ModuleNotFoundError: No module named 'bs4'

[HighervGround]

Did you do

pip install -r requirements.txt