Facebook expires the images after a while. You'll need to delete all the Facebook reviews and re-download them. After it downloads them, leave the pop-up window open for a few minutes. The plugin will try to save the pictures locally so they won't expire again.

It's picking up the alignment of the container. Try using this in the custom CSS for the review template...

.wpproslider_t6_DIV_1a {
text-align: left;
}

Hey Mari,

There is no reason to export from the free version. Simply use the Pro version to download them again. If you would like all your reviews you can use the Get Reviews > Review Funnel page. If they are Facebook reviews then use the Get Reviews > Facebook.

Have you tried this setting?

You can also do this...

https://wpreviewslider.userecho.com/en/knowledge-bases/2/articles/445-vertical-scrollbar-on-review-to-control-height

Have you tried the Change Height of Each Slide setting?