It migt be common if you encounter an issue when you try to access internet sites. The reason is that specific SSL certificates are not imported on your laptop. This note is a quick tutorial how you can import SSL certificate on your MacBook.
Click "Not Secure" on your Chrome URL bar and select the root certificate. Drag the certificate and drop it somewhere you like.
Double click the certificate. Select "System" and hit "Add", and it will import the certificate to Keycahin.
Double click the certificate which has been imported.
Hit "Trust" and select "Always Trust", and close Keychain. You will be asked to input your MacBook's password - try to do.
Try to visit the site you would like to access - it might be working if the import has been done successfully!