If you are displaying a recent hashtag feed and the images in your feed are showing as an error or as blank, there may be an issue with the image resizing feature.
In order to show tweets in recent hashtag feeds that were made more than 24 hours prior, the plugin stores data related to these posts in custom tables. The image files are also stored locally after being resized so that they continue to be available.
In order for the image resizing and storing process to work, your server must have “Imagick” installed and configured properly. You may want to contact your host to see if there is any issue with Imagick.
For more information on how image resizing works, see this FAQ.