Why did Ella Langley cancel her concert despite police advice?

According to the stories, Ella Langley cancelled her sold-out Tulsa concert due to a serious security threat, not because police advised her to do so [2]. In fact, police have stated they did not advise her to call off the concert, despite Langley defending her decision by saying "a concert's not worth a human life" [1]. She cited the safety of fans, venue staff and her team as the reason for the "incredibly difficult" decision [2].