Ring Pro too much voltage?

Ring Pro powered by Ring Plugin Adapter died, unable to enter setup, only half circle, with bottom section flashing. Contacted Ring and they sent a replacement Ring Pro, installed it only go have the same result as the original, halfcircle lit with bottom section flashing. Measured the power at the doorbell and get 27VAC, which seems to be too much since it needs 16-24VAC. Power Adapter says to connect directly to Ring Pro.