Please allow a few minutes for the device to upload it's local IP address after a reboot or network change.
Note that sharkrf.link is not required for opening the web interface.
http://openspot.local/
or
http://openspot2/
can also be used (however, resolving these requires support from the browser and/or the browser's operating system, that's why we recommend always using sharkrf.link to open the web interface).