By Foo Yun Chee and Sudip Kar-Gupta BRUSSELS, Nov 5 (Reuters) - Europe's top court on Thursday ordered a tribunal to reassess its decision to block €3.4 billion ($3.8 billion) in Dutch state aid to. The General Court had in 2021 and 2024 backed challenges against the aid from rival Ryanair, prompting the European Commission to appeal to the Luxembourg-based Court of Justice of the European Union (CJEU).