Assuming you are speaking of the tc-8.x x86 version of libreoffice, I saw the same thing when trying to save in odt format initially.
Next I tried to save a file in docx format, which worked without errors. After that I noticed that, despite the error message, the file had been saved in odt format anyway - I was then able to open, modify and save this file and any others I tried in odt format.
Perhaps this is something to do with these files: $ ls -a /home/tc/.config/libreoffice/4/user/basic
dialog.xlc script.xlc