Jan 20, 2021
Root Certificate Requirement for Accessing Information Securely on a Secure Server
Browsers “embed” a certificate in them so that the holders of the private keys associated with that certificate can identify websites on the internet, that certificate is called a root certificate. The root certificates of GlobalSign are trusted by 99.99% of all browsers so when the certificates that they issue to websites are used users experience a smooth experience with no security alerts. In the rare event that the visitor's browser does not trust GlobalSign already they will need to manually install the GlobalSign root certificates or on each visit accept a security warning when visiting the site. GlobalSign root certificates are available under Root Certificates.
Check your certificate installation for SSL issues and vulnerabilities.