On a WinXP 32 machine, when I leave the GUI opened for a while, when I’m back I often find it hanged with the red error message stating ~ST may have a problem or refresh page~. Refreshing shows a running GUI. In the console I see
2017/02/04 19:36:40 http: TLS handshake error from 127.0.0.1:4371: read tcp 127.0.0.1:8384->127.0.0.1:4371: i/o timeout
2017/02/04 19:36:40 http: TLS handshake error from 127.0.0.1:4370: read tcp 127.0.0.1:8384->127.0.0.1:4370: i/o timeout
2017/02/04 19:36:40 http: TLS handshake error from 127.0.0.1:4372: read tcp 127.0.0.1:8384->127.0.0.1:4372: i/o timeout
2017/02/04 19:36:40 http: TLS handshake error from 127.0.0.1:4373: read tcp 127.0.0.1:8384->127.0.0.1:4373: i/o timeout
2017/02/04 19:36:40 http: TLS handshake error from 127.0.0.1:4374: read tcp 127.0.0.1:8384->127.0.0.1:4374: i/o timeout