From what I see in the picture I dare to claim it’s an i18n issue.
Can you try putting this formula in cell A2?
=EVEONLINE.ACTIVE_CHARACTER().id
or
=EVEONLINE.ACTIVE_CHARACTER().name
Have you tried changing your system language to english? You can also force excel to switch to different language via File → Options → Language
Or something like that maybe?
файл → параметры → язык?
EDIT:
I switched my excel to russian and the add-in still works. So maybe it’s something else 
There is free web based version of Office 365 and I’ve heard people are using the add-in with it.