On 16 January 2019 the European Parliament approved the agreement between the EU and Morocco to extend trade preferences to products from Western Sahara. Please see here the press release from the European Parliament.
The next step in the ratification from the EU is the decision of conclusion by the Council. This decision is expected few weeks after the vote of the European Parliament. The ratification process in Morocco is ongoing.
The agreement should enter into force the first day after the EU and Morocco have notified to each other the completion of their respective ratification.