Here the message says На Украине, which in Russian is intentionally used to take away from the fact of Ukraine being an independent country. Nobody would ever say На России or На Великобритании. They say В России and В Великобритании, and it should be the same way for Ukraine. It's a bit like the difference between "the Ukraine" and "Ukraine" but much more politically charged.
Here the message says На Украине, which in Russian is intentionally used to take away from the fact of Ukraine being an independent country. Nobody would ever say На России or На Великобритании. They say В России and В Великобритании, and it should be the same way for Ukraine. It's a bit like the difference between "the Ukraine" and "Ukraine" but much more politically charged.
Also see this section of the Ukrainian Wikipedia.
Edit: Created a pull request.