Review schedule explorer for WaniKani
< Wanikani Ultimate Timelineについてのフィードバック
I had the same thing, but for some reason it worked when I entered the plain web address (https://www.wanikani.com/) in the address bar. Didn't load when there was additional stuff after the final '/', though I can't see why. Might be a temporary solution.
doesn’t work 2019-04-17
does nothing