VIENNA, Austria (AFP) — A 21-year-old man pleaded guilty on Tuesday in an Austrian court to a jihadist plot to attack a Taylor Swift concert, which led to the cancellation of the Vienna leg of the US megastar’s “Eras” tour. Three dates in Swift’s record-breaking tour were canceled in the summer of 2024 after authorities warned of the alleged Islamic State group plot. The accused, named as Beran A., was led into the courtroom by masked police personnel at the start of his trial on terror offenses and other charges in a court in Wiener Neustadt, outside Vienna. “He pleads guilty to all except attempted murder,” his lawyer Anna Mair told AFP. Another 21-year-old, Arda K., is standing trial together with Beran A., according to Austrian news agency APA.…