Pi Aware 3.5.3 NTP not getting time servers


Viewing an anomaly on my stats and says my time is out by 26 mins, I have Pi Aware 3.5.3, I have restarted NTP it is running but is not able to connect to any NTP time servers, the only recent change I’ve had here is changing from ADSL 2+ to a Fibre Optic internet connection and new modems to suit, the NTP clients on my computers are connecting fine to NTP time servers but Pi Aware NTP client can’t connect to any? anyone have suggestions / idea’s? Modem is a ISP supplied Huawei HG659,.not a super techy person, layman’s terminology.