Our website is being marked as unsafe "https://epa.org.kw"

Hello,

I've just noticed that our website (The Environment Public Authority of Kuwait) is being marked as unsafe. We have tested the website server and everything seems Ok. We also have an SSL security certificate installed on the server. We've read the report of Norton but we can't understand where is the issue.

The domain name is "https://epa.org.kw"

Looking forward a solution.

Thank you