Internal Error in PTP 450 GUI http and https access

Hi, i have a point-to-point link with PTP450 and software version CANOPY 15.0.2 BHUL450-AES.

I need to reset device from CLI in telnet because after a while i cannot access GUI with http or https.

Ping never fails and services, passing through radio link, works fine.

The issue is related to management GUI only.

In attach Event log.

Can you help me ?