Why is my site banned? :( I've been working on it for about 4 years


Hello guys! I have a news magazine for Russian speaking visitors. Yesterday when I tried to twit about new post it told me that the web site is not safe :frowning:
Twitter is really important for me :frowning:

I’ve checked the site for viruses and malware - it’s clean.

Could you please help me out? What do I need to do?

The web site is operkor.net