You can only upgrade the SRW224's firmware using the Console interface
and not using the WebView web-based utility. 

Before attempting a Firmware Upgrade, make sure that you have a copy of
the firmware downloaded and stored on the local machine performing the
procedure.

WARNING:  DO NOT attempt to do a firmware upgrade without having
firmware code downloaded and ready.  Not having a file to send when
prompted will cause the Switch to time out and crash.

DO NOT interrupt the firmware upgrade process once it has begun - this
will cause the Switch to crash.  
