Dmitry Berezhkov. The immediate reason for the closure is Russia’s upcoming chairmanship of the Arctic Council

The immediate reason for the closure is Russia’s upcoming chairmanship of the Arctic Council. Security forces and strategists are clearing space. When negotiating with RAIPON, international organizations should understand that they are faced with illegitimate representatives of Russia’s indigenous peoples.

https://www.themoscowtimes.com/2019/12/02/russia-is-removing-critical-voices-ahead-of-arctic-council-chairmanship-indigenous-expert-claims-a68415