help editing user in php

I understood, I downloaded a simple task management script, everything is working, just the editing part of the user that is not, I would like you to look at this part of the code, I can come by if you want, after I have logged in, I am directed to the home, then I go to the top menu and click on my account, I should open a modal with my data but it gives an error and does not open the modal, now if I remove this top part of the page it works more brings the fields in White. <? php include ('[login to view URL]'); session_start (); if (isset ($ _ GET ['id']) && $ _GET ['id']> 0) { $ user = $ conn-> query ("SELECT * FROM users where id =". $ _ GET ['id']); foreach ($ user-> fetch_array () as $ k => $ v) { $ goal [$ k] = $ v; } } ?> thank you in advance for any and all help.