Image Error

Good night,

“We cannot complete this request, remote data could not be fetched”

I am having problems ya, related to the images shown in my article not showing the picture , I did some settings are:
1. writting >> settings >> >> disable convert emotion
2. jetpack >> disabled

My question is what is this jatpack plugin ? explanation please thank you

https://ww.wp.xz.cn/plugins/jetpack/