Installaton of nlpsolver from Software Manager is improper for Libreoffice Version: 7.3.6.2 / LibreOffice Community Build ID: 30(Build:2) CPU threads: 4; OS: Linux 5.15; UI render: default; VCL: gtk3 Locale: pl-PL (pl_PL.UTF-8); UI: pl-PL Ubuntu package version: 1:7.3.6-0ubuntu0.22.04.2 Calc: threaded. Try nlpsolver.oxt.