Unable to install the 360 Monitoring agent: To connect to monitoring.platform.360.io” is insecurely

Symptoms

Attempt to install the 360 Monitoring agent using the wget command line fails with one of the following errors:

ERROR: cannot verify monitoring.platform360.io's certificate, issued by '/C=US/O=Let's Encrypt/CN=R3':
Issued certificate has expired.
To connect to monitoring.platform360.io insecurely, use `--no-check-certificate'

Error in cURL request: SSL certificate problem: certificate has expired

Cause

The OS is out of date.
The CA certificates contain obsolete information about some root CA.

Resolution

1. Connect to the server via SSH

2. Update the OS packages:

   • For RHEL-based (RHEL/CentOS/AlmaLinux/CloudLinux):

     # yum update

   • For Debian-based (Debian/Ubuntu):

     # apt-get update && apt-get upgrade

3. Try to install the agent once again