Not secure site on nabble forum

[Atharvaa]

Thum is is my nabble forum: https://www.knowitian.com/p/forum.html
Why it is showing site is not secure. The https is also on. What the problem can anyone help me?

[Israel <Nabble>]

On my side it is shown as "Connection Secure". I am using Chrome.

[Atharvaa]

Can you please try again.
GO to https://www.knowitian.com/ and go to Forum from the menu bar button.