The assessment is based on a single, high-authority news article that directly and comprehensively supports the statement. The source from ricentral.com, which has high authority and perfect relevance, explicitly states that Ukraine's telecommunications regulator, the 'National Commission for the State Regulation of Electronic Communications,' blacklisted Polymarket. It also specifies the reason for this action was the platform's lack of a required gambling license, thus confirming every component of the claim.The other provided sources, all from the Polymarket website itself, do not contradict this claim. While they do not mention the block, they serve to provide context for the regulator's actions. These pages show that Polymarket hosts numerous prediction markets on sensitive topics directly related to Ukraine, including the ongoing war, potential ceasefires, and the political future of its president. This content makes the regulatory scrutiny and subsequent block described in the news article highly plausible.There is no conflicting evidence among the provided sources. The conclusion rests on one strong, direct piece of evidence, which is corroborated by the contextual information from the other sources, leading to a high-confidence assessment that the statement is likely true.