Uncaught (in promise) TypeError: Cannot read property 'nodeName' of null
at getBoundingClientRect (popper.js?660c:460)
at getOffsetRectRelativeToArbitraryNode (popper.js?660c:486)
at getReferenceOffsets (popper.js?660c:739)
at Popper.update (popper.js?660c:912)
at Popper.update$$1 (popper.js?660c:2460)
at eval (popper.js?660c:45)