When an Excel spreadsheet is locked, the name of the person who has locked it does not always show up. Please fix
It appears that a recent change was made to display the name of the person who has locked an Excel spreadsheet. Unfortunately, the name does not always show. I still get the message "Someone else is editing ..." with no name.
Amy-lynn Corey commented
File > Options
Quick Access Toolbar: On the Choose Commands From, select "Commands not in ribbon"
Scroll down to "Share Workbook (Legacy) and add it to your toolbar
Click it and select "Use the old shared..." and OK
Tell it to pound sand when it suggests going to collaboration mode. DONE.