We need screenshots, exact info about the images/ a sample image. The files could simply get damaged on save of contain "bad" metadata that throws off AE plus there could be a million otehr things going on. Impossible to tell from your vague info.
Yeah, post one of the jpegs.
A photo? is that a single photo, or multiple photos which were created using photoshop because , After Effects supports a maximum image size of 30,000x30,000 pixels for importing and rendering files also the size of image that you can import or export is influenced by the amount of physical RAM available to After Effects. The maximum composition dimensions are also 30,000x30,000 pixels.
Can also follow
Hope it helps