Why would this be incorrect? "Nic ji nikdy nestačilo!"
Well, it should be recognized as a typo, because "ji" is for accusative, dative requires "jí". In practise people often use "jí" even in accusative.
"Nic jí nikdy nestačilo" was not accepted, however
Accepted, with a bunch of similar sentences.
thanks. This course is really well maintained.