Hey I keep getting Invalid connection key on heresphere app even though I can successfully connect with the Handyverse app just fine. Not sure what my issue is, I changed the connection key like three times and each time making sure it was typed in correctly. 

It was working fine, not sure what happened. Any help please?

Not sure, I tested on my headset and handy and it connects fine for me. Maybe try restarting your router and handy by power cycling it. Change the connection key again. Maybe try clearing the key from HereSphere, restart the app, then input the connection key in (though that shouldn't matter, but who knows).