I stumbled upon this by accident, I don't know if this functionality is used very much, or at all. Note: I used the image teapot.xpm on this page https://people.math.sc.edu/Burkardt/data/xpm/xpm.html to test. I also tried to make one with GIMP with the same result. To recreate: 1. Enable LocalCoverImages 1.1. Go to Administration > System preferences 1.2. Search for LocalCoverImages 1.3. Change the value to 'Show' 1.4. Click 'Save all Enhanced content preferences' 2. Import an XPM image as a cover image 2.1. Download the teapot.xpm image from the site above, or another .xpm image 2.2. Search for a record and go to the detailed page 2.3. Click the 'Images (0)' tab 2.4. Click 'Upload' --> Note that the help message above the box to select a file says 'The tool will accept images in GIF, JPEG, PNG, and XPM formats.' 2.5. Click 'Drop files here or click to select a file' 2.6. Choose the .xpm image --> Note that at this point, the image preview is a broken image 2.7. Click 'Process images' --> Error message: 'Cannot process file as an image. Please ensure you only upload GIF, JPEG, PNG, or XPM images.' I opened the teapot.xpm image in GIMP and it opens fine. It's not corrupted as far as I know. I think we should either fix the XPM import or remove the mention that the tool accepts XPM format.