Something is broken in enigma2-plugin-extensions-apcupsd-tools_1.3_all.ipk when doing vanilla installation on Vu+Duo4k i.e. with no previous apcupsd package installed.
This release finishes with an error message "Value OS" is not defined and the plugin does not show up on the menu.
The workaround is to remove version 1.3 and install 1.2, which completes fine. Then remove 1.2 and install back 1.3. This time the installation goes through OK.
Sorry,fixed.
Edited by Dimitrij, 13 August 2021 - 10:09.