LibreOffice cannot find/load the JDBC driver
LibreOffice needs to know the path to the class (jar) file for the JDBC driver. You will have to enter it.
Under Utils > Options > LibreOffice, choose Java.
On that page click on the button titled Class Path....
Click the button Add an archive to enter the .jar file.
Click the button Add a directory to enter the directory containing the .jar files.