deploy with npu raise The context is empty

[jq460494839]

When I test tests/launch_openai_api_test_server.py with NPU, it raise:

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(allocate:torch_npu/csrc/core/npu/NPUCachingAllocator.cpp:2050 NPU error, error code is 107002
[Error]: The context is empty.
        Check whether acl.rt.set_context or acl.rt.set_device is called.
EE1001: The argument is invalid.Reason: rtGetDevMsg execute failed, reason=[context pointer null]
        Solution: 1.Check the input parameter range of the function. 2.Check the function invocation relationship.
        TraceBack (most recent call last):\n        ctx is NULL![FUNC:GetDevErrMsg][FILE:api_impl.cc][LINE:4620]
        The argument is invalid.Reason: rtGetDevMsg execute failed, reason=[context pointer null]