If you are in the Southern Africa region, specific firmware folders can be found on the D-Link Southern Africa product page Firmware Recovery:
Because D-Link segments its support portals by geographic region, check the portal that matches where you purchased your device: dwr930m firmware link
Ensure you are actively connected to the router's Wi-Fi network and not your home internet. Try clear your browser cache or use an Incognito window. If you are in the Southern Africa region,
. You can check their Support Resources page for available firmware and utilities. You can check their Support Resources page for
Click to select the firmware file you downloaded earlier. Click Update or Upload to start the process.
Click Select File or Browse , choose the firmware you downloaded, and click Upload .
Resolves issues like sudden reboots or "No Service" errors. Where to Find the Official DWR-930M Firmware Link