The self-signed SSL (secure socket layer) works perfectly for encrypting the data, but it is not signed by a valid CA. This is the reason why, when you access the control panel using the SSL , an SSL warning will be prompted. This KB will teach you how to get rid of the self-signed SSL warning across different types of web browser.
Solution: Click on 'ADVANCED', then click on 'Proceed to URL.com (Unsafe)' to bypass SSL warning in Chrome.
Solution: Click on 'Advanced', then click on 'Add Exception'. Next click on 'Confirm Security Exception' to bypass SSL warning in Mozilla Firefox.
Microsoft Edge / Internet Explorer
Solution: Click on 'Continue to this webpage (non recommended)' to bypass the SSL warning in Microsoft Edge / IE.