Fix CSRF error

Fix CSRF error

Author: mzch

notebook.py

@@ -30,7 +30,8 @@
 app.permanent_session_lifetime = timedelta(minutes=SessionConst.SESSION_TTL.value)
 
 # Protection against CSRF attack
-CSRFProtect(app)
+csrf = CSRFProtect(app)
+csrf.init_app(app)
 
 # databases
 account_db = Account()