The website is broken.

[Nicholas Lee]

The website is broken for me, and I see a sequence of orange pop-up messages saying "An error occurred. Please try again or contact your administrator."

[Daniel Wang]

Try the solution in this post here: devzone.nordicsemi.com/.../website-error-popups---please-try-again-or-contact-your-administrator

[Nicholas Lee]

Thanks.
I seem to have fixed it (for now) by closing Chrome, logging-in and then logging-out of the site with Internet Explorer, and then logging back-in using Chrome again.
Something is clearly flaky with the site, but at least there seems to be a workaround.