ItemDesc returns "Array"

Hi, i try to get descriptions for a product but they wont show up. i tried it both ways

[amazon-element asin="3944789229" fields="lg-image,desc,ItemDesc"]

[AMAZONPRODUCTS asin="3944789229" desc=1]

desc just show nothing and ItemDesc says “Array”

https://ww.wp.xz.cn/plugins/amazon-product-in-a-post-plugin/