Running version: 1.5.8.6#dev
Python version: 3.9.6
Operating system: Windows-10-10.0.17763-SP0
Command line: sqlmap.py
Technique: None
Back-end DBMS: None

Traceback (most recent call last):
  File "sqlmap.py", line 216, in main
    start()
  File "lib/core/decorators.py", line 80, in _
    result = f(*args, **kwargs)
  File "lib/controller/controller.py", line 383, in start
    message = "[%d/%d] URL:\n%s %s" % (targetCount, len(kb.targets), HTTPMETHOD.GET, targetUrl)
TypeError: object of type '_' has no len()