I was recieving an error:
personal.xlsm is locked for editing
Open ‘Read-Only’ or click ‘Notify’ to open read-only and recieve notification when the document is no longer in use.
everytime I opened excel and the error was related my personal.xlsm file which was located in the XLStart folder. When I finally researched it I realized that, probably due to a computer crash, .xlsm file was still stuck “open”. When I navigated to the folder I noticed the ~$personal.xlsm still existed even when excel was closed.
Once I deleted this file the problem went away.