May I seek advise of why my users getting the error and how I can avoid the error in future?
3 of my users getting attached error when they are trying to upload Folder to SharePoint online.
They are the member of the team site.
I am the owner of the team site and never get the similar error.
Error: Unbale to get property "key" of undefined or null reference.
Web browser : New Edge
Alternative solution taken: Sync SharePoint folder with local computer drives and use copy and paste to save the folder to the corresponding directory.