OS Ubuntu 20.0.4 1. Downloaded LibreOffice_24.8.3_Linux_x86-64_deb.tar.gz 2. Extract to folder LibreOffice_24.8.3.2_Linux_x86-64_deb 3. I followed directions for "Graphical Interface (preferred)" as described in https://wiki.documentfoundation.org/Documentation/Install/Linux/it#Trovare_i_pacchetti_adatti_per_l'installazione_e_per_la_lingua 4. In Terminal, I run "libreoffice": the application opens with only Writer Document, Math Formula or Base Database. Writer seems to run fine but I cannot create or open a Calc Spreadsheet or Draw or Presentation.
I see the Italian version was last updated in 2015. I'm not sure, if any relevant changes were made, but could you try with the English version: https://wiki.documentfoundation.org/Documentation/Install/Linux An alternative is to use an appimage: https://www.libreoffice.org/download/appimage/