Hello. I have the same problem (or a similar one) with Fortigate 60D / E 5.4.1 and with FortiWifi 60E. I just have lan and WAN connected, one policy to allow LAN to WAN all traffic with Log All Session enable. My devices connected to LAN interfaces are able to surf on the internet (policy and default route created). This policy rules log all sessions. In the log settings, I log all that I want on the memory and I display log from memory. But when I want to see log, I just see Deny: IP Connection Error.
I can't see allowed trafic and other potential deny. This is very strange because these log entries match my unique policy "LAN to WAN".
