无法翻译（SSL证书验证失败）

[kqwyf]

系统：Ubuntu 18.04 64位
现象：
前段时间一直能正常使用，最近出现问题。
使用popup-dict-switcher启动成功，选中文字后无反应。
使用命令行popup-dict启动成功，任意选中一段文字，命令行输出：

[2018-09-18 08:18:22.791] [ERROR] [youdao-zhiyun] Request failed for query='stall'
Traceback (most recent call last):
File "/usr/lib/python3/dist-packages/urllib3/connectionpool.py", line 601, in urlopen
chunked=chunked)
File "/usr/lib/python3/dist-packages/urllib3/connectionpool.py", line 346, in _make_request
self._validate_conn(conn)
File "/usr/lib/python3/dist-packages/urllib3/connectionpool.py", line 852, in validate_conn
conn.connect()
File "/usr/lib/python3/dist-packages/urllib3/connection.py", line 326, in connect
ssl_context=context)
File "/usr/lib/python3/dist-packages/urllib3/util/ssl.py", line 329, in ssl_wrap_socket
return context.wrap_socket(sock, server_hostname=server_hostname)
File "/usr/lib/python3.6/ssl.py", line 407, in wrap_socket
_context=self, _session=session)
File "/usr/lib/python3.6/ssl.py", line 814, in init
self.do_handshake()
File "/usr/lib/python3.6/ssl.py", line 1068, in do_handshake
self._sslobj.do_handshake()
File "/usr/lib/python3.6/ssl.py", line 689, in do_handshake
self._sslobj.do_handshake()
ssl.SSLError: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:833)

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "/usr/lib/python3/dist-packages/requests/adapters.py", line 440, in send
timeout=timeout
File "/usr/lib/python3/dist-packages/urllib3/connectionpool.py", line 639, in urlopen
_stacktrace=sys.exc_info()[2])
File "/usr/lib/python3/dist-packages/urllib3/util/retry.py", line 388, in increment
raise MaxRetryError(_pool, url, error or ResponseError(cause))
urllib3.exceptions.MaxRetryError: HTTPSConnectionPool(host='openapi.youdao.com', port=443): Max retries exceeded with url: /api?q=stall&from=EN&to=zh-CHS&appKey=43f66ef2247d5446&salt=5023&sign=c1c4b5978d0438a83f28743ece64e959 (Caused by SSLError(SSLError(1, '[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:833)'),))

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "/usr/local/lib/python3.6/dist-packages/popupdict/query/client/youdao_zhiyun.py", line 27, in query
res = requests.get(self.API, params=self._params(text), timeout=self.config.request_timeout)
File "/usr/lib/python3/dist-packages/requests/api.py", line 72, in get
return request('get', url, params=params, **kwargs)
File "/usr/lib/python3/dist-packages/requests/api.py", line 58, in request
return session.request(method=method, url=url, **kwargs)
File "/usr/lib/python3/dist-packages/requests/sessions.py", line 508, in request
resp = self.send(prep, **send_kwargs)
File "/usr/lib/python3/dist-packages/requests/sessions.py", line 618, in send
r = adapter.send(request, **kwargs)
File "/usr/lib/python3/dist-packages/requests/adapters.py", line 506, in send
raise SSLError(e, request=request)
requests.exceptions.SSLError: HTTPSConnectionPool(host='openapi.youdao.com', port=443): Max retries exceeded with url: /api?q=stall&from=EN&to=zh-CHS&appKey=43f66ef2247d5446&salt=5023&sign=c1c4b5978d0438a83f28743ece64e959 (Caused by SSLError(SSLError(1, '[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:833)'),))
[2018-09-18 08:18:22.934] [ERROR] [youdao-zhiyun] Request failed for query='nstall'
Traceback (most recent call last):
File "/usr/lib/python3/dist-packages/urllib3/connectionpool.py", line 601, in urlopen
chunked=chunked)
File "/usr/lib/python3/dist-packages/urllib3/connectionpool.py", line 346, in _make_request
self._validate_conn(conn)
File "/usr/lib/python3/dist-packages/urllib3/connectionpool.py", line 852, in validate_conn
conn.connect()
File "/usr/lib/python3/dist-packages/urllib3/connection.py", line 326, in connect
ssl_context=context)
File "/usr/lib/python3/dist-packages/urllib3/util/ssl.py", line 329, in ssl_wrap_socket
return context.wrap_socket(sock, server_hostname=server_hostname)
File "/usr/lib/python3.6/ssl.py", line 407, in wrap_socket
_context=self, _session=session)
File "/usr/lib/python3.6/ssl.py", line 814, in init
self.do_handshake()
File "/usr/lib/python3.6/ssl.py", line 1068, in do_handshake
self._sslobj.do_handshake()
File "/usr/lib/python3.6/ssl.py", line 689, in do_handshake
self._sslobj.do_handshake()
ssl.SSLError: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:833)

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "/usr/lib/python3/dist-packages/requests/adapters.py", line 440, in send
timeout=timeout
File "/usr/lib/python3/dist-packages/urllib3/connectionpool.py", line 639, in urlopen
_stacktrace=sys.exc_info()[2])
File "/usr/lib/python3/dist-packages/urllib3/util/retry.py", line 388, in increment
raise MaxRetryError(_pool, url, error or ResponseError(cause))
urllib3.exceptions.MaxRetryError: HTTPSConnectionPool(host='openapi.youdao.com', port=443): Max retries exceeded with url: /api?q=nstall&from=EN&to=zh-CHS&appKey=43f66ef2247d5446&salt=8599&sign=75e2df61a2f77d7226283c6304b54ef3 (Caused by SSLError(SSLError(1, '[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:833)'),))

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "/usr/local/lib/python3.6/dist-packages/popupdict/query/client/youdao_zhiyun.py", line 27, in query
res = requests.get(self.API, params=self._params(text), timeout=self.config.request_timeout)
File "/usr/lib/python3/dist-packages/requests/api.py", line 72, in get
return request('get', url, params=params, **kwargs)
File "/usr/lib/python3/dist-packages/requests/api.py", line 58, in request
return session.request(method=method, url=url, **kwargs)
File "/usr/lib/python3/dist-packages/requests/sessions.py", line 508, in request
resp = self.send(prep, **send_kwargs)
File "/usr/lib/python3/dist-packages/requests/sessions.py", line 618, in send
r = adapter.send(request, **kwargs)
File "/usr/lib/python3/dist-packages/requests/adapters.py", line 506, in send
raise SSLError(e, request=request)
requests.exceptions.SSLError: HTTPSConnectionPool(host='openapi.youdao.com', port=443): Max retries exceeded with url: /api?q=nstall&from=EN&to=zh-CHS&appKey=43f66ef2247d5446&salt=8599&sign=75e2df61a2f77d7226283c6304b54ef3 (Caused by SSLError(SSLError(1, '[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:833)'),))
[2018-09-18 08:18:23.092] [ERROR] [youdao-zhiyun] Request failed for query='install'
Traceback (most recent call last):
File "/usr/lib/python3/dist-packages/urllib3/connectionpool.py", line 601, in urlopen
chunked=chunked)
File "/usr/lib/python3/dist-packages/urllib3/connectionpool.py", line 346, in _make_request
self._validate_conn(conn)
File "/usr/lib/python3/dist-packages/urllib3/connectionpool.py", line 852, in validate_conn
conn.connect()
File "/usr/lib/python3/dist-packages/urllib3/connection.py", line 326, in connect
ssl_context=context)
File "/usr/lib/python3/dist-packages/urllib3/util/ssl.py", line 329, in ssl_wrap_socket
return context.wrap_socket(sock, server_hostname=server_hostname)
File "/usr/lib/python3.6/ssl.py", line 407, in wrap_socket
_context=self, _session=session)
File "/usr/lib/python3.6/ssl.py", line 814, in init
self.do_handshake()
File "/usr/lib/python3.6/ssl.py", line 1068, in do_handshake
self._sslobj.do_handshake()
File "/usr/lib/python3.6/ssl.py", line 689, in do_handshake
self._sslobj.do_handshake()
ssl.SSLError: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:833)

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "/usr/lib/python3/dist-packages/requests/adapters.py", line 440, in send
timeout=timeout
File "/usr/lib/python3/dist-packages/urllib3/connectionpool.py", line 639, in urlopen
_stacktrace=sys.exc_info()[2])
File "/usr/lib/python3/dist-packages/urllib3/util/retry.py", line 388, in increment
raise MaxRetryError(_pool, url, error or ResponseError(cause))
urllib3.exceptions.MaxRetryError: HTTPSConnectionPool(host='openapi.youdao.com', port=443): Max retries exceeded with url: /api?q=install&from=EN&to=zh-CHS&appKey=43f66ef2247d5446&salt=2470&sign=d9f75ded4fd29c9e18a56a3f6ed33b3f (Caused by SSLError(SSLError(1, '[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:833)'),))

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "/usr/local/lib/python3.6/dist-packages/popupdict/query/client/youdao_zhiyun.py", line 27, in query
res = requests.get(self.API, params=self._params(text), timeout=self.config.request_timeout)
File "/usr/lib/python3/dist-packages/requests/api.py", line 72, in get
return request('get', url, params=params, **kwargs)
File "/usr/lib/python3/dist-packages/requests/api.py", line 58, in request
return session.request(method=method, url=url, **kwargs)
File "/usr/lib/python3/dist-packages/requests/sessions.py", line 508, in request
resp = self.send(prep, **send_kwargs)
File "/usr/lib/python3/dist-packages/requests/sessions.py", line 618, in send
r = adapter.send(request, **kwargs)
File "/usr/lib/python3/dist-packages/requests/adapters.py", line 506, in send
raise SSLError(e, request=request)
requests.exceptions.SSLError: HTTPSConnectionPool(host='openapi.youdao.com', port=443): Max retries exceeded with url: /api?q=install&from=EN&to=zh-CHS&appKey=43f66ef2247d5446&salt=2470&sign=d9f75ded4fd29c9e18a56a3f6ed33b3f (Caused by SSLError(SSLError(1, '[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:833)'),))