This warning is presented by a web browser when accessing a site that has a security certificate installed (for SSL/TLS data encryption) which cannot be verified or installed by the web browser.
To solve this issue, we recommend you to temporarily turn off “Scan SSL” feature in Bitdefender as follows:
bring up the main Bitdefender interface
click on Settings from the upper right toolbar
From Settings Overview choose Privacy Control
In the Antiphishing tab use the switch to temporarily turn off Scan SSL feature
Now close the Bitdefender window and try to access the webpage one more time.