CANNOT ACCESS F5 VIRUAL SERVER GUI

If this is urgent, please raise a sev1 support ticket with F5 Support.

That said. Did you check the network? The subnet for the VIPs should have self IPs in the F5 BIGIP. These IP addresses are used for SNAT auto map. However, did you also make sure that the internal network has a route for that subnet pointing to the F5 self IP (standalone) or floating self IP (HA)?