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Fatal Error - Call to memeber Function - on Null

Hi All!
Hope you can help me, below is my error (it doesn't happen all the time, but only for specific views & filters.
Fatal error: Call to a member function _qO7o() on null in /var/www/html/migration/KoolPHPSuite/KoolControls/KoolPivotTable/koolpivottable.php on line 1
This will clear the entire pivottable and only show the error. There isn't a null that the pivot table deals with.
Can anyone help me find ways to see what's really going on or how to fix? Any help is appreciated. Thanks .
Posted Dec 4, 2019 Kool
Anthony Amolochitis
Do you have the source code of KoolPHP? If so you can step through it. I wonder if you are getting an empty set on a filter.
Try doing a sql query that matches the filter to see if you get an empty set.
Posted Dec 5, 2019 Kool