I have the same problem today. I am currently in Poland
Others also. https://www.wikitree.com/g2g/1699266/challenge-tracker-crashing-and-a-question
Also, are you using the WikiTree Browser Extension, or any other extension? See
https://www.wikitree.com/g2g/1632385/challenge-tracker-not-working
Still down. Getting this message:
plus.wikitree.com took too long to respond.