Chrome and Safari reports R3 not trusted on a Macbook with Big Sur

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My domain is:

I ran this command: Use browser to open

It produced this output: "" certificate is not trusted

This only happens on a Macbook running Big Sur 11.6.1. On this macbook, Chrome (Version 95.0.4638.69 (Official Build) (x86_64)) reports "" certificate is not trusted. But Firefox works well.

Other machines I have, including Ubuntu+Chrome, iOS+Chrome, iOS+Safari can access the website with no problem.

My web server is (include version): Apache Tomcat 9.0.54

The operating system my web server runs on is (include version): Debian 10, kernel 4.19.208-1

My hosting provider, if applicable, is: Google Cloud Platform

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

I'm using a control panel to manage my site (no, or provide the name and version of the control panel): no

The version of my client is (e.g. output of certbot --version or certbot-auto --version if you're using Certbot): certbot 1.21.0

@harperjiang Welcome to the community!

Your server is only sending a "leaf" certificate. It should be sending the leaf and intermediate chain. I think you need to add the certificateChainFile to your server config using the (path)/chain.pem similar to your other two lines for the Lets Encrypt certs.

See for reference:

Here is a site to check what your server sends:




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