[rinkeby] httpx.ConnectError: [Errno 8] nodename nor servname provided, or not known

[Yakim1429]

mycode:
provider = ZkSyncProviderV01(provider=HttpJsonRPCTransport(network=network.rinkeby))
provider.get_contract_address()

result:
The above exception was the direct cause of the following exception:

Traceback (most recent call last):
File "/Users/yakim/PycharmProjects/web3-gadget/contract/zksync_test_callC.py", line 122, in
test_sync()
File "/Users/yakim/PycharmProjects/web3-gadget/contract/zksync_test_callC.py", line 86, in test_sync
loop.run_until_complete(task)
File "/Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.8/lib/python3.8/asyncio/base_events.py", line 616, in run_until_complete
return future.result()
File "/Users/yakim/PycharmProjects/web3-gadget/contract/zksync_test_callC.py", line 81, in get_contract_address
ret = await provider.get_contract_address()
File "/Users/yakim/PycharmProjects/web3-gadget/test_env/lib/python3.8/site-packages/zksync_sdk/zksync_provider/v01.py", line 59, in get_contract_address
data = await self.provider.request("contract_address", None)
File "/Users/yakim/PycharmProjects/web3-gadget/test_env/lib/python3.8/site-packages/zksync_sdk/transport/http.py", line 16, in request
response = await client.post(self.network.zksync_url, json=self.create_request(method, params))
File "/Users/yakim/PycharmProjects/web3-gadget/test_env/lib/python3.8/site-packages/httpx/_client.py", line 1842, in post
return await self.request(
File "/Users/yakim/PycharmProjects/web3-gadget/test_env/lib/python3.8/site-packages/httpx/_client.py", line 1527, in request
return await self.send(request, auth=auth, follow_redirects=follow_redirects)
File "/Users/yakim/PycharmProjects/web3-gadget/test_env/lib/python3.8/site-packages/httpx/_client.py", line 1614, in send
response = await self._send_handling_auth(
File "/Users/yakim/PycharmProjects/web3-gadget/test_env/lib/python3.8/site-packages/httpx/_client.py", line 1642, in _send_handling_auth
response = await self._send_handling_redirects(
File "/Users/yakim/PycharmProjects/web3-gadget/test_env/lib/python3.8/site-packages/httpx/_client.py", line 1679, in _send_handling_redirects
response = await self._send_single_request(request)
File "/Users/yakim/PycharmProjects/web3-gadget/test_env/lib/python3.8/site-packages/httpx/_client.py", line 1716, in _send_single_request
response = await transport.handle_async_request(request)
File "/Users/yakim/PycharmProjects/web3-gadget/test_env/lib/python3.8/site-packages/httpx/_transports/default.py", line 353, in handle_async_request
resp = await self._pool.handle_async_request(req)
File "/Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.8/lib/python3.8/contextlib.py", line 131, in exit
self.gen.throw(type, value, traceback)
File "/Users/yakim/PycharmProjects/web3-gadget/test_env/lib/python3.8/site-packages/httpx/_transports/default.py", line 77, in map_httpcore_exceptions
raise mapped_exc(message) from exc
httpx.ConnectError: [Errno 8] nodename nor servname provided, or not known