Page keeps loading

Hi,
I’m building a plugin on my Local machine.
It’s xampp for Mac.

When I activated the plugin it’s showing several notices as Debug is true now.
The First Notice is: Undefined offset: 3 in…. ..query.php
Then Trying to get property of non-object in… query.php
Shows it several times.
Then the same error in one of my plugins files Trying to get property of non-object in…. plugin_file.php
then the same thing doing a loop…

The offset number keeps rising. Undefined offset: 4 in…. ..query.php .. then 5, then 6..
And most of all the page keeps loading for a long while…
Please someone come up with a solution…