为什么这个里面没有值

网址参数不能为空

Traceback (most recent call last):

 File "C:\Program Files (x86)\ShadowBot\shadowbot-5.14.25\python\lib\runpy.py", line 193, in _run_module_as_main

   "__main__", mod_spec)

 File "C:\Program Files (x86)\ShadowBot\shadowbot-5.14.25\python\lib\runpy.py", line 85, in _run_code

   exec(code, run_globals)

 File "C:\Program Files (x86)\ShadowBot\shadowbot-5.14.25\python\lib\site-packages\xbot_interpreter.py", line 97, in <module>

   main()

 File "C:\Program Files (x86)\ShadowBot\shadowbot-5.14.25\python\lib\site-packages\xbot_interpreter.py", line 57, in main

   try:

 File "C:\Users\admin\AppData\Local\ShadowBot\users\611703410434703362\apps\cd28b3f5-8784-4c87-804d-13ab59f488e0\xbot_robot\main.py", line 19, in main

   ], _block=("main", 9, "调用流程"))

 File "<string>", line 89, in wrapper

 File "<string>", line 84, in wrapper

 File "<string>", line 82, in run

 File "C:\Users\admin\AppData\Local\ShadowBot\users\611703410434703362\apps\cd28b3f5-8784-4c87-804d-13ab59f488e0\xbot_robot\process1.py", line 47, in main

   ], _block=("子流程1", 25, "调用流程"))

 File "<string>", line 89, in wrapper

 File "<string>", line 84, in wrapper

 File "<string>", line 82, in run

 File "C:\Users\admin\AppData\Local\ShadowBot\users\611703410434703362\apps\cd28b3f5-8784-4c87-804d-13ab59f488e0\xbot_robot\process2.py", line 14, in main

   web_page = xbot_visual.web.create(web_type="chrome", value=loop_item, silent_running=False, wait_load_completed=True, load_timeout="20", stop_load_if_load_timeout="handleExcept", chrome_file_name=None, edge_file_name=None, ie_file_name=None, bro360_file_name=None, firefox_file_name=None, arguments=None, _block=("子流程2", 2, "打开网页"))

 File "<string>", line 89, in wrapper

 File "<string>", line 84, in wrapper

 File "<string>", line 60, in create

 File "<string>", line 48, in create

 File "<string>", line 84, in create

 File "<string>", line 30, in valid

ValueError: 网址参数不能为空