All accusations concerning Russia’s meddling in the 2016 US presidential election are speculative. The Mueller report contains no proof of collusion.
Zelenskyy was not able to discuss Crimea [during the Normandy summit], whose incorporation into Russia has therefore effectively been accepted by the EU. He has accepted the Steinmeier formula which Ukrainian nationalists hate because it forces Ukraine to grant decentralized federal status to Donetsk and Lugansk.
See previous disinformation cases alleging recognition of the annexation of Crimea: NYT says Crimea is Russian; Catalan leaders have recognized Crimea; Naftogaz recognized Crimea; EU will recognize Crimea as a part of Russia.
The EU's stance on the annexation of Crimea has remained unchanged since March 2014, when the it imposed the initial round of travel bans and asset freezes on entities and "persons involved in actions against Ukraine's territorial integrity." Most recently, the sanctions regime has been extended until June 2020.