Sunny zephyr exercise bike (Teaneck)

Purchased a few months ago, used about ten times. Was riding and pedals seem to stop turning the wheel. I'm guessing the belt slipped off but I can't fix it, hopefully you can. Here is the exact model on Amazon. https://www.amazon.com/gp/product/B078KGKR5W/ref=ppx_yo_dt_b_search_asin_ti... . Have to put out on street so lets figure a time that works.