Hi,
I removed the attachment because it contained the address of your site. As you know, the error states that the file is checked out. My only advice would be to close (if you have it open in an editor) and check it in – and not not use check-out in the SPJS document library because it will most likely result in some files not being checked in, and this will result in some strange issues for other users that end up loading an older version or not seeing the file at all.
Alexander