Please Help Me...
Whenever i use Search by keyword in products this message show...
and than i clear my ui_bookmark in mysql than work normal but i can't use search function in products
In my case, It was due to that some null SKU related error I resolved using the following query.
UPDATE catalog_product_entity SET sku='' WHERE sku IS NULL;
Thanks, that's solved my problem too !
have you fixed this ?. im also having same issue