ERRORS (Диагностика связи)

Подскажите пожалуйста в чем проблема. Все  работающие терминалы от одной Wi-Fi  перестали работать, на терминалах появилось сообщение "Диагностика связи". Лог с одного терминала:

MobileSMARTS.exe; Exchange; 26/01/2018 16:53:51.000 ERROR
ADDITION TEXT:    DataExchanging.LoadEnvironment function
MESSAGE:    NullReferenceException STACK TOP: at Cleverence.Warehouse.Compact.DataStorage.Invoke()
TYPE:        System.NullReferenceException
[STACK TRACE]
        at Cleverence.Warehouse.Compact.DataStorage.Invoke()
        at Cleverence.Warehouse.Compact.DataStorage.Invoke()
        at Cleverence.Warehouse.Compact.DataExchanging.LoadEnvironment()
        at Cleverence.Warehouse.Compact.AdvDataExchanger.LoadEnvironment()
        at Cleverence.Warehouse.Compact.AdvDataExchanger.ExchangeThread()
[STACK TRACE]

и постоянно идут логи на терминалах:

MobileSMARTS.exe; 178439650; 26/01/2018 16:45:00.000 DeviceInfo: wireless updated
MobileSMARTS.exe; 191805578; 26/01/2018 16:45:28.000 DeviceInfo: wireless updated
MobileSMARTS.exe; 184796690; 26/01/2018 16:45:56.000 DeviceInfo: wireless updated
MobileSMARTS.exe; 175423946; 26/01/2018 16:46:24.000 DeviceInfo: wireless updated
MobileSMARTS.exe; 181192582; 26/01/2018 16:46:52.000 DeviceInfo: wireless updated
MobileSMARTS.exe; 183092414; 26/01/2018 16:47:19.000 DeviceInfo: wireless updated
MobileSMARTS.exe; 181978426; 26/01/2018 16:47:48.000 DeviceInfo: wireless updated
MobileSMARTS.exe; Exchange; 26/01/2018 16:48:14.000 DeviceInfo: wireless updated
MobileSMARTS.exe; 176474490; 26/01/2018 16:48:45.000 DeviceInfo: wireless updated
MobileSMARTS.exe; 175162042; 26/01/2018 16:49:13.000 DeviceInfo: wireless updated
MobileSMARTS.exe; 179027938; 26/01/2018 16:49:41.000 DeviceInfo: wireless updated
MobileSMARTS.exe; 182044146; 26/01/2018 16:50:09.000 DeviceInfo: wireless updated
MobileSMARTS.exe; 191805690; 26/01/2018 16:50:37.000 DeviceInfo: wireless updated
MobileSMARTS.exe; Exchange; 26/01/2018 16:51:02.000 DeviceInfo: wireless updated
MobileSMARTS.exe; 176012578; 26/01/2018 16:51:32.000 DeviceInfo: wireless updated
MobileSMARTS.exe; 179093978; 26/01/2018 16:52:01.000 DeviceInfo: wireless updated
MobileSMARTS.exe; 179093978; 26/01/2018 16:52:29.000 DeviceInfo: wireless updated