RT-N66U stuck in CFE miniWeb Server

I performed a 30/30/30 reset before doing a firmware upgrade and now I can't get it out of the miniWeb Server.

If I try installing firmware from here it says it's successful and then nothing else happens.

When I power cycle it, it boots up into the miniWeb Server and if I leave it turned off for a while it still boots up into the miniWeb Server.

Any ideas?