Just tried to save a Microsoft Excel document which was password protected in ODS format. And got the above error.
Was running LibreOffice 184.108.40.206 and the Help ==> Check for Updates showed that a newer version was available
So I downloaded and installed versions “LibreOffice_4.0.1_Linux_x86-64_rpm.tar.gz” and “LibreOffice_4.0.1_Linux_x86-64_rpm_helppack_en-US.tar.gz”
tar -zxvf LibreOffice_4.0.1_Linux_x86-64_rpm.tar.gz tar -zxvf LibreOffice_4.0.1_Linux_x86-64_rpm_helppack_en-US.tar.gz cd LibreOffice_220.127.116.11_Linux_x86-64_rpm cd RPMS/ su -c 'yum localinstall *.rpm' cd ../.. cd LibreOffice_18.104.22.168_Linux_x86-64_rpm_helppack_en-US/ cd RPMS/ su -c 'yum localinstall *.rpm'
The spreadsheet then successfully saved in ODS format.