Same here. I think it has something to do with the Alliance upgrade.
[EDIT]
Looks like there's a bug thats triggered when the window gets opened.
2017-07-31 03-03-52| could not execute function 'onShowWindow' in '"data/scripts/entity/merchants/researchstation.lua"':
2017-07-31 03-03-52| data/scripts/entity/merchants/researchstation.lua:250: attempt to call global 'SelectionItem' (a nil value)
2017-07-31 03-03-52| stack traceback:
2017-07-31 03-03-52| data/scripts/entity/merchants/researchstation.lua:250: in function <data/scripts/entity/merchants/researchstation.lua:219>