Help with "Deceptive Website Warning" on My Site

Hi!

I'm working on my business website, and I noticed that it's not working properly on mobile devices and in Safari. When I try to open the site, I see a "Deceptive Website Warning" page.

This is a new domain and the site is still under development. Here's the link: https://fortinetz.ru

I've checked the site using several online tools, and all of them report it as clean:

Sucuri SiteCheck

VirusTotal

URLVoid

Google Search Console also says there are no security issues found.

Could you please help me understand how to resolve this warning?

Thanks a lot!