How do I fix the issue "Can't validate server certificate"? (Mac)

Before troubleshooting, please make sure:

  • You are connected to the internet via WiFi or LAN
  • To isolate the cause, temporarily disable any 3rd party app that may interfere with your connection. For example, a firewall with strict settings, or another VPN application or an antivirus.
  1. Try to reinstall the app's profile, it should fix the issue;
    • From System Preferences > Network> select Hotspot Shield VPN profile
    • Click on the minus "-" sign at the bottom to remove the profile. Click Apply to save changes  
  2. Launch app and reinstall profile or try to connect. Dialog box to install profile might appear. Click "Allow" in the dialog box. Connect Hotspot Shield if it allows you to. 
  3. From System Preferences > Network> Click on Hotspot Shield VPN > Click connect switch button (please note UI on/off button will be off all the time)