Oh this problem again. I have been getting this error for every single update since 3 hotpaches ago. Every single time. This error is persistent, but, from what I have read and experienced, it will go away between 1 and 8 hours of it occurring.

As to why this happens, not a single person has been able to give me a good answer, be it from the community or the technical team.

You guys might get it only one time. As for me, I pretty much gave up on getting on early when a new patch drops because the likelihood of this happening to me again is too high for me to bother.

Just wait it out for now. If nothing happens in about 6 hours, contact SE support.