Why was US senator Chris Van Hollen allowed to meet deported Kilmar Abrego Garcia in El Salvador hours after being denied?

Senator Chris Van Hollen met Kilmar Abrego Garcia in El Salvador after initially being denied access to the prison where Garcia is held. Garcia was mistakenly deported under the Trump administration despite a judge's order protecting him from deportation due to gang violence. The meeting occurred amid criticism of Garcia's treatment and potential pressure from US courts.