Sharepoint Online error when editing a listitem e.split is not a function

Hello Ahanney, I'm sure you have solved this a long time ago, but for others who may come by this thread... I encountered this very issue today and, in my case, it was a brand-new list created from an Excel document. I had several columns that I set the type to be Choice. The import did a good job at keeping the values but did not populate the choices. Once I set all the choice options for all the choice columns this problem went away. So, check your choice column settings or possibly any special columns you may have as they are likely the source of the problem. Good Luck!