High SWR with My Moxon Yagi: Can you guess why?

Recently I had posted a video on satellite RX using my Moxon Yagi. One of the viewers suggested that I should check the antenna as the reception seemed to be below par. Though I was using the antenna in fixed elevation-azimuth, I thought of checking it out. Used my NanoVNA to check the SWR initially before bringing the antenna down for physical inspection.