Alerts section totally broken

[Alv63]

hi everyone. 

after upgrading to version 15.1, the alerts section on web console has been disappeared from navigation menu and also lost the hyperlinks on the dashboard. additionally, when i generate a 'Report on threats' having added the 'Open alert' field, then again on the generated report the 'View alert' link nothing is popped up or displayed.

any clues why? it used to work like charm on previous 14.2 version.

thanks.