As a premium member of Geochaching.com, I sometimes use the Challenge Checkers that are included in the listings and have never had a problem until recently. After "authenticate" and "agree" I am led to an empty website (at firefox).
On other computers and my smartphone I have the same problem. Cookies and browser cache were deleted. In my setting the access of project-gc is allowed.
Now I've created a new account (this one) to represent my problem here and to get help. With the new account I have no problem on my computer.
Does anyone have an explanation and tips on how to use the Challenge Checker again as a PM?
Thanks in advance.