How to Solve MB SD C4 Plus DOIP WiFi Connection Error

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MB SD C4 Plus DOIP WiFi connection problem: An error message prompts as shown in the following picture. And there is something wrong with the WIFI. Is possible to use LAN cable to connect?
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Solution Advice:

There are two connection methods for MB SD C4 PLUS: by Wifi or network cable.

If it failed to connect by WIFI, please use network cable instead of it.

If the WLAN is ok, don’t modify the IP setting.