VideoMakerFX doesn't actually add the images to your project. It sorts of create a hotlink to the image based on where it was saved on your computer. So if you have removed or moved those images from their previous location, they would be actually missing on the project you're working on.
If you haven't indeed removed or moved them, you may double click on these slides that's having the issue to refresh them. If issue still exists, you can try re-adding the images to these slides. If this doesn’t work, you may need to recreate the specific slide that’s having the issue.
If you're still having issues after these troubleshooting steps, kindly open a Support Ticker by sending us an email at firstname.lastname@example.org.