I run deepin and libreoffice v4.3, I have a spreadsheet that I have been updating for years. Recently I got an unexpected error when attempting to open the spreadsheet and haven’t been able to open it since. I transferred the file to the windows v5.4 and was able to open the file and update it. I down loaded the most recent version of Libroffice but got the same error.
Most errors are unexpected! Perhaps if you provide the exact error message it might be easier to provide help for you.
Was finally able to open my spreadsheet in version 6.0. not exactly sure why it was able to open because it error again but finally opened. It happened when the file was being restored, the restoration was successful but when it attempted to open the file is when the error would occur. Hopefully this will be the end of this occurrence.