Question: asked to verify billing address before upgrade to High Sierra, and it produced error page, help please.
I was trying to upgrade my mac air 2011 to the High Sierra from Yosemite 10.10.5 and the system asked me to verify billing address which i actually already has set up correctly on apple store (SG location). After it asked, i clicked continue but it produced error message "your request produced an error" as in screenshot. I am not able to download new version up to now. Any suggestions? I am new here (: Thank you.
MacBook Air (11-inch Mid 2011), iOS 10.3.3, 10.10.5