If you are trying to install LibreOffice and get an error dialog with Error Code 1303 then a simple fix is available. Your installation of LibreOffice will not continue until you exit the installation process and restart your computer.
To solve the error code 1303 you can try exiting the installation and restarting the computer. After the computer restarts you can retry the installation again. This time around the installation of LibreOffice should be successful with no issues.