Notification.php page shows error in line 256

[Ranjul-Arumadi]

When I click on Notifications the above-attached error comes. The error stays on the right side of the screen. I was only able to get half of the error message in the screenshot.

[ardatious]

I had to remove the line that include $profileData, there is no such variable.

[Serifarat]

It works when I give "$user_id " instead of "$profileData"