I still see the same error. Which servers (Server Location) do you use
for signature update under "FortiGuard" Tab? Lowest latency locations or
restrict to specific region?
Exactly the same on FG200E and FG100D (both 7.2) since yesterday morning
(12th of July). The worst thing is that FortiGate support has no clue
and makes typical troubleshooting like checking routing, DNS,
connectivity.