Chromecast AP Isolaton error

So I have been having a problem playing media on my TV using my chromecast. I am able to set up my chromecast but on trying to cast, the chromecast either disconnects from the internet once I connect my laptop to the same wifi or vice versa. I get a pop-up error on the Google Home App that it may be due to ‘AP Isolation error’ that is disabled on my router.
Trying to resolve it from my end as I have the routers admin credentials but hit a wall.

FYI: My ISP is Safcom and router details is as seen on the picture attached

screenshot ya WAN information page nikutengenezee :D:D:D:D:D:D