Why won't my sliding door not opening and closing please only the one door other on 2008 Kia Sedona

Just had car working at first but not now the other sliding door is working.

Asked by for the 2008 Kia Sedona
From my experience.....I have 03'Sedona. The plastic castor wheel that door slides on is worn down and should be replaced. My vehicle had same problem and it's simple plastic wears down over time. When problem starts it gets worse the longer you wait. I suggest purchasing kit that will replace plastic castor with a metal one. Look up tutorial on YouTube to show how to remove and replace. It's that easy. Hope this helps you