When I was uploading my images to my wordpress blog, the page shows my upload fails. And then when I refresh my webpage, it shows Error data base message. Then, after about one day when I re-open my website, it shows Error 521.
I have already looked through those Erro 521 posts, but I don’t know how exactly I need to check firewall whitelist or how can I fix it. Sorry I am a beginner on these.
Can someone really help me?
#communitytip 521 error