ImportError: /usr/lib/x86_64-linux-gnu/libsgx_dcap_quoteverify.so.1: undefined symbol: pthread_create_ocall

[luokingkill]

when I test Hyperledger Avalon Proxy model with Hyperledger Besu.
I got a error:

~/avalon$ docker exec -it avalon-shell bash
root@3708c69249e6:/project/avalon# cd examples/apps/generic_client/
root@3708c69249e6:/project/avalon/examples/apps/generic_client# ./generic_client.py -b ethereum --workload_id "echo-result" -o --in_data "Hello" \

--worker_id "singleton-worker-1"

Traceback (most recent call last):
File "/usr/local/lib/python3.6/dist-packages/verify_dcap_quote/dcap_verify_report.py", line 14, in swig_import_helper
return importlib.import_module(mname)
File "/usr/lib/python3.6/importlib/init.py", line 126, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
File "", line 994, in _gcd_import
File "", line 971, in _find_and_load
File "", line 955, in _find_and_load_unlocked
File "", line 658, in _load_unlocked
File "", line 571, in module_from_spec
File "", line 922, in create_module
File "", line 219, in _call_with_frames_removed
ImportError: /usr/lib/x86_64-linux-gnu/libsgx_dcap_quoteverify.so.1: undefined symbol: pthread_create_ocall

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "./generic_client.py", line 23, in
from direct_model_generic_client import DirectModelGenericClient
File "/project/avalon/examples/apps/generic_client/direct_model_generic_client.py", line 34, in
from base_generic_client import BaseGenericClient
File "/project/avalon/examples/apps/generic_client/base_generic_client.py", line 22, in
import verify_dcap_quote.verify_dcap_quote_util as dcap_util
File "/usr/local/lib/python3.6/dist-packages/verify_dcap_quote/verify_dcap_quote_util.py", line 17, in
import verify_dcap_quote.dcap_verify_report as dcap_report_util
File "/usr/local/lib/python3.6/dist-packages/verify_dcap_quote/dcap_verify_report.py", line 17, in
_dcap_verify_report = swig_import_helper()
File "/usr/local/lib/python3.6/dist-packages/verify_dcap_quote/dcap_verify_report.py", line 16, in swig_import_helper
return importlib.import_module('_dcap_verify_report')
File "/usr/lib/python3.6/importlib/init.py", line 126, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
ModuleNotFoundError: No module named '_dcap_verify_report'