Is the proxy server configured correctly?
If you connect to the Internet via a proxy server, check if the proxy server information is correct in the network settings of your computer.
Is the ScanSnap connected to the network?
If the ScanSnap is connected to the network via Wi-Fi, check the following:
Check the status and settings of your network environment.
Turn on the wireless access point.
After checking the above, close the ADF paper chute (cover) to turn off the ScanSnap, open the ADF paper chute (cover) to turn it back on, then check if the problem is solved.
When the startup mode of the ScanSnap is set to [Fast], the ScanSnap is not turned off even if you close the ADF paper chute (cover).
Unplug the power cable from the AC outlet and plug it back in again, and then open the ADF paper chute (cover).
If the problem still persists, connect the computer and the ScanSnap using a USB cable.