Nothing has changed about the plugin since you last tried, though. I need to resolve a probable issue in Avogadro itself before I can release a new version of the plugin.
I’ll have a look at your other files when I get the chance, thanks. The log that the plugin produces would be very helpful as well, it should be in ~/.local/state/easyxtb/, but note that it gets overwritten with every calculation, so it needs to be the log file from just after the calculation has completed.