A week ago, Google Analytics fixed a bug with content data reports, now they need to fix issues with Google Analytics users logging into their accounts.

There are several threads in the Google Analytics Help forum discussing how Google is displaying an error message when they login.

Googler, Christelle, said in a Google Analytics Help thread:

So if you are seeing the message, “Error Has Been Detected,” please go to the URL above and fill out the form.

Forum discussion at Google Analytics Help.