Login/System Error

Traceback (most recent call last):
  File "index.cgi", line 28, in 
    from app import app, db
  File "/home/users/0/holy.jp-simante/web/umameru/app.py", line 5, in 
    from config import Config
  File "/home/users/0/holy.jp-simante/web/umameru/config.py", line 13, in 
    class Config:
  File "/home/users/0/holy.jp-simante/web/umameru/config.py", line 16, in Config
    raise ValueError("No SECRET_KEY set for Flask application. Please check your environment variables.")
ValueError: No SECRET_KEY set for Flask application. Please check your environment variables.