求报错 can't start new thread 的解决方案？

经常会报这个错误，但不知什么问题，该如何解决呢？

==============

Traceback (most recent call last):
File "D:\Program Files (x86)\ShadowBot\shadowbot-5.8.18\python\lib\runpy.py", line 193, in _run_module_as_main
"__main__", mod_spec)
File "D:\Program Files (x86)\ShadowBot\shadowbot-5.8.18\python\lib\runpy.py", line 85, in _run_code
exec(code, run_globals)
File "D:\Program Files (x86)\ShadowBot\shadowbot-5.8.18\python\lib\site-packages\xbot_interpreter.py", line 67, in <module>
main()
File "D:\Program Files (x86)\ShadowBot\shadowbot-5.8.18\python\lib\site-packages\xbot_interpreter.py", line 47, in main
mod.main(args)
File "C:\Users\Administrator\AppData\Local\ShadowBot\users\7c2a5fd6-6f9c-4be2-bbce-3c693d8aee7d\apps\c7168e8e-da67-4377-86c5-35f30500712a\xbot_robot\main.py", line 74, in main
raise e
File "C:\Users\Administrator\AppData\Local\ShadowBot\users\7c2a5fd6-6f9c-4be2-bbce-3c693d8aee7d\apps\c7168e8e-da67-4377-86c5-35f30500712a\xbot_robot\main.py", line 70, in main
output_info, err_info, exit_code = xbot_visual.system.run_dos_command(dos_command="adb shell am broadcast -a android.intent.action.MEDIA_SCANNER_SCAN_FILE -d file:///storage/emulated/0/DCIM/PDDimage", working_folder="D:\\Program Files (x86)\\ShadowBot\\platform-tools", encoding="None", _block=("main", 54, "运行DOS命令"))
File "<string>", line 79, in wrapper
File "<string>", line 74, in wrapper
File "<string>", line 169, in run_dos_command
File "D:\Program Files (x86)\ShadowBot\shadowbot-5.8.18\python\lib\subprocess.py", line 474, in run
stdout, stderr = process.communicate(input, timeout=timeout)
File "D:\Program Files (x86)\ShadowBot\shadowbot-5.8.18\python\lib\subprocess.py", line 939, in communicate
stdout, stderr = self._communicate(input, endtime, timeout)
File "D:\Program Files (x86)\ShadowBot\shadowbot-5.8.18\python\lib\subprocess.py", line 1251, in _communicate
self.stdout_thread.start()
File "D:\Program Files (x86)\ShadowBot\shadowbot-5.8.18\python\lib\threading.py", line 852, in start
_start_new_thread(self._bootstrap, ())
RuntimeError: can't start new thread