I'm currently in the middle of this where I updated my main router (Wireless Router mode) RT-AC68R and the web GUI is being unresponsive. At first, no wireless connection was available. I power cycled the router to see if wireless connection shows up. It does, but I prematurely power cycled again without realizing that 2.4 GHz was available but not the 5 GHz. After the second power cycle, both wireless bands are available, but the interface is still loading. So as someone said above, I'll wait until the database finish building. I updated a slave router and that went by quicker, almost as quick as any other Merlin firmware updates. So the waiting game continues... Update: It's available now. That was a short wait (less than 10 minutes).