(update)
It seems all the *.europa.eu sites are blocking Tor across the board now. Even this page is unreachable to Tor users:
https://have-your-say.ec.europa.eu/index_en
It’s a bit embarrassing at the EU level. You might expect a mom/pop shop to be unable to handle Tor users, but the EU (a government of nation states) should have their infosec shit together and have the security competency to serve Tor users.