Please see the Troubleshooting section in the user manual
http://manuals.sharkrf.com/openspot2/en/troubleshooting.html
at the The openSPOT2 can't connect to the selected server section:
If you want to connect to the BrandMeister network, and the openSPOT2 won't connect to any BrandMeister server, then make sure you use the hotspot security password you've set on your BrandMeister SelfCare page (or turn off hotspot security so the default server password can be used).