Actually, the EPG import problem stemmed from the rytec.sources.xml file. Doglover provided a fix or workaround on the openpli.org website.
However, when I select "Plugin" from the menu, I still get the error message:
Some plugins are not available:
Extensions/EPGSearch (cannot import name 'VKB_SEARCH_ICON' from 'Screans.VirtualKeyBoard' (/usr/lib/enigma2/python/Screens/VirtualKeyBoard.py))
And I don't understand Kiddac's response : 'shouldn't that be screens'. What can I do please?