I asked a question about a solution for searching tags in Meta SE, you can see my question in following the link: SEDE
It was working since Aug 10th and after that when I was trying to open SEDE like I face this error SEDE Error.
I did comment on the error and @Glorfindel suggests that i should ask a new question to find out why this error is happening and his suggestion was, maybe it is related to my location.
I get this error even after disabling Firefox plugins and extensions and restarting. I am logged in and not using a VPN. It works in Chrome and IE 11.
I would appreciate you if you can help me to find a solution to this issue.