Here is the log:
[Network] setting proxy {'password': '', 'mode': 'http', 'port': '3298', 'host': 'localhost', 'user': ''}
[Network] connecting to 14.3.140.101:51002:s as new interface
[testnet.hsmiths.com] failed to connect Socket error: 403: Forbidden
[*] Note: The HTTP proxy server may not be supported by PySocks (must be a CONNECT tunnel proxy)
[testnet1.bauerj.eu] failed to connect Socket error: 403: Forbidden
[*] Note: The HTTP proxy server may not be supported by PySocks (must be a CONNECT tunnel proxy)
[14.3.140.101] failed to connect Socket error: 403: Forbidden
[*] Note: The HTTP proxy server may not be supported by PySocks (must be a CONNECT tunnel proxy)
[testnetnode.arihanc.com] failed to connect Socket error: 403: Forbidden
[*] Note: The HTTP proxy server may not be supported by PySocks (must be a CONNECT tunnel proxy)
[electrum.akinbo.org] failed to connect Socket error: 403: Forbidden
[*] Note: The HTTP proxy server may not be supported by PySocks (must be a CONNECT tunnel proxy)
[FxThread] using exchange BitPay
[ELEX05.blackpole.online] failed to connect Socket error: 403: Forbidden
[*] Note: The HTTP proxy server may not be supported by PySocks (must be a CONNECT tunnel proxy)
[BitPay] getting fx quotes for EUR
[BitPay] failed fx quotes: Cannot connect to proxy. Socket error: Socket error: 403: Forbidden
[*] Note: The HTTP proxy server may not be supported by PySocks (must be a CONNECT tunnel proxy)
As you can see I have no need to set any user and password because I use Squid to configure proxy...
So, what could be the problem?