Had this problem on the 16/17th randomly and when it pop's up it happens every 2-5mins. Looked around and did the general chat but still had the problem. Checked firewall didn't help, open port still same issue.

Did something else (unifi 5mb dlink 615) and this problem seems to be solved. 18/19th 0 error 3007.

Not sure if blizzard did something or it was what I did tho.