When I look at it on my browser, it appears to have a valid SSL certificate. What browser are you using? Do you have any security plugins installed or programs like Norton running?
I think services like that are overly protective when it comes to shared hosting / free sites. They mark a lot of stuff as “dangerous” when it’s not.
Many major browsers have built-in screens to block deceptive/dangerous content. I know Firefox, Chrome, and Edge all do. Firefox and Chrome both get their list from Google Safe Browsing, whereas Edge gets its list from Microsoft SmartScreen. I’m pretty sure other browsers like Opera and Brave and whatnot have features like this built-in (and also probably get their list from GSB).
However, @if0_34749564 when I load your site using MS Edge and Chrome, I get no warnings. It also seems like the SSL/TLS certificate is working and issued by GTS (ironic, is it not?).