FortiClient SSL VPN failure stages and what they mean. If FortiClient fails as the following stages, the likely cause is as follows:

• 10% – Local Network/PC issue
• 40% – Application or the Fortigate causing the error, occasionally caused by the local machines/network setup
• 45% – MultiFactor Authentication
• 80% – Username/Password issue
• 98% – corruption of services/often resolved by reinstalling the client on the laptop.