[Bug]:executing examples/functionality/plan/main_manual_plan.py Error

[fhkankan]

An error occur examples/functionality/plan/main_manual_plan.py

Describe the bug
while executing examples/functionality/plan/main_manual_plan.py An error occured.

Error messages

[DavdGao]

Thanks for your report, and we will fix it as soon as possible. For a quick fix, you can install the Ray library by the command pip install ray