In fact, it is easy.
Please reproduce the issue and provide log file located at /home/pi/.openauto/cache/openauto.log (please do not restart OpenAuto Pro application otherwise logs will be overwritten).
Also please post output of ifconfig command and double check that Raspberry PI is connected to the same WiFi network as your phone and has valid IP address.
Please reproduce the issue and provide log file located at /home/pi/.openauto/cache/openauto.log (please do not restart OpenAuto Pro application otherwise logs will be overwritten).
Also please post output of ifconfig command and double check that Raspberry PI is connected to the same WiFi network as your phone and has valid IP address.