Deceptive website warning

hello, since yesterday i am getting this message in all browsers in my applications in reverse proxy subfolder.

i use raspberry pi 4 4gb
nginx 1.18
ddns > duckdns
system last version dietpi

I would like to know how to solve this problem?

Not sure what kind of security software you are running but it seem that your website has been reported as dangerous. Or at least you could try testing from a complete different device. Maybe not an Apple one.

sorry, I think it has nothing to do with this forum my post, what happens is that buying a mini pc with windows and after opening it in chrome gave this problem, I changed my ddns to no-ip and it persisted in chrome, now in safari and in Edge and Firefox it works perfectly, I related to Google what happened and I will wait for the answer…