Forticlient is not working with Andriod 10 Kernal 4.19.87 UI 2.5 Samsung Galaxy s20

i want to connect forticlient 6.4.3.0462 on my latest phone  "Andriod 10 Kernal 4.19.87 UI 2.5 Samsung Galaxy s20" but not successful .

message "sorry ,could not start connection"offic e".

Error: Revoked by Andriod:REBOOT!

But after reboot and many other client option try  but not successful .

If any body facing this issue ,please help me.