Lets encrypt ssl mobile warning

[Neeraj365611]

My domain is:mechanic37.com

7 days ego i installed lets encrypt ssl its working fine on desktop. But mobile pages showing warning and after reload page it shows lock sign

My web server is (include version): Nginx

The operating system my web server runs on is (include version):Ubuntu 20.4

My hosting provider, - digital ocean

I can login to a root shell on my machine (yes or no, or I don't know):yes

[MikeMcQ]

Your cert chain looks fine to me.

If you click the triangle icon does it show a more detailed message? What is it?

Also, is it all mobile devices or some specific ones? If specific, what system, browser, and versions of both?

UPDATE:
Welcome to the community @Neeraj365611

And, I think you may be having problems with "Mixed Content". That's when an HTTPS website has links using just HTTP://

[Neeraj365611]

Yes i checked on android device
I also updated browser
And my home page adress starts with https
After reload its showing secure

[rg305]

There is some questionable code:

"http://134.209.144.190/wp-content/uploads/2020/04/cropped-mechanic37-\u0932\u094b\u0917\u094b-2.jpg"
"http://mechanic37.com/wp-content/uploads/2020/04/\u092d\u094c\u0924\u093f\u0915-\u0935\u093f\u091c\u094d\u091e\u093e\u0928-\u0928\u094b\u091f\u094d\u0938.jpg"
"http:\/\/134.209.144.190\/#organization"

[as well as many other links to pages starting wth: http://mechanic37.com/]