While my dropdown menu option was working fine on a tablet-sized display, it suddenly stopped functioning after I published my project and ran the code in Visual Studio 2019 Preview version 16.10. I'm now seeing an error message in the browser console. Can someone help me troubleshoot and fix this issue?
dropdown.js:143 Uncaught TypeError: Cannot read property 'classList' of undefined
at o.r.show (dropdown.js:143)
at o.r.toggle (dropdown.js:139)
at Function.o.dropdownInterface (dropdown.js:371)
at HTMLAnchorElement.<anonymous> (dropdown.js:525)
at HTMLDocument.i (event-handler.js:119)