I just tried logging in under my account and under your account and I am able to access the notification settings page.
https://gmatclub.com/forum/ucp.php?i=pr ... e_settingsI think there is something not very usual. I am wondering if your device or browser are configured in some special way (which may also impact your mba.com account). Are you using any kind of a particular browser, operating system, device (e.g. tablet) or privacy settings/etc?
I'd like to fix it but I need to be able to reproduce it and logging in with multiple accounts on my computer, the settings page works, so I am trying to figure out what settings I should have on my computer/browser. Appreciate any tips!