I am unable to print any saved documents after updating to libre 7.5
LibreOffice 7.5 doesn’t yet exist. Try my answer to question 267726 to see if it helps.
If not, then you will need to edit (see icon at bottom of question) your question to add LO version and Operating System and version (copy from Help > About LibreOffice). You also need to add printer brand and model and type of connection, e.g. WiFi, etc. Cheers, Al