Securly_SHA-256 Certificate is expiring in 2020. Once it expires, it won't work. Please make sure you install Securly_ca_2034.

Issue: You need to verify the Securly SSL certificate has been installed in Mac OS X

Solution:Navigate, in Finder, to Applications > Utilities > Keychain Access.

- Double-click to open Keychain Access.

- Select the “System” keychain, select Certificates under Category, and look for the * SSL certificate.

To install the Securly SSL certificate

  1. Open Keychain Access>File>Import Items
  2. Navigate to the location that you saved the Securly SSL certificate file to (you can download the file below)
  3. Import the "securly_ca_2034.crt" file into the “System” keychain
  4. Verify the SSL certificates: Issued To "*" is installed

Source: Securly