Several nations boycotted the summit in Skopje due to Russia's attempts at crippling the OSCE's decision-making. Moscow vetoed Estonia's bid for the European security grouping's rotating chairmanship. https://www.dw.com/en/osce-malta-secures-chair-as-russia-relents-on-veto/a-67604249?maca=en-rss-en-eu-2092-rdf