One sdconnect C4 user had the error ” Due to network problems, the network connection to the SDconnect was interrupted during diagnosis. (748).
No SDconnect is selected or the desired SDconnect cannot be selected.”
He attached several error images showing how he operated:
obdexpress.co.uk engineer solution:
From the above image 3, you should not tick off the second option “Wlan parameter”.
There is a user guide in the software, please carefully read it.