Im finish Range filter, but next level on main road still closed. Refreshhing and relogin dont help.
Beat the levels available that you already clicked on(Yellow one),
Sooner or later the next levels will be unlocked for you as you progress the game.
major levels are independent of the other. and open in order. try ti complete 2 lastest
You must complete all other levels before moving on to the next one. Make sure you have completed all of the blue levels and ALL the available levels in Kithgard Dungeon. Same bug happened to me and it was only that I missed a couple levels.