Hi yadayado!
Sorry to hear this is happening. This message means there are screenshot uploads that were started but never finished. Normally if an upload fails, App Store Connect will report an error and delete the unfinished screenshot for you. But it sounds like in this case a failed screenshot did not get deleted successfully.
You can delete these yourself manually:
Go to your app version page where you see your screenshots.
Click “View All Sizes in Media Manager”. This should take you to a page with all available display types and sizes.
Click the “>” icon by each display size to expand every section.
Unfinished screenshots show as a grey placeholder icon instead of an actual screenshot. Normally these tell you someone else on your team is in the process of uploading a screenshot. But if that’s not the case, then it means a screenshot upload failed, and did not get cleaned up automatically. If you see any of these:
Hover your mouse pointer over the screenshot. A red (-) icon will appear over the top-left corner.
Click the (-) icon to delete the placeholder.
If you have more than one localization for your app, use the locale picker in the top-right corner of this page to check each localization.
Hope this helps!
We are having the same problem. The message that we receive is: Unable to Submit for Review The items below are required to start the review process: There are still screenshot uploads in progress. We have converted the images from jpg to png - no difference. We have deleted the images that that said image load error - no difference We have tried loading on different computers - no difference We have never had this problem before At first the images all show as having been loaded. There are no errors. Then we click submit for review, and all the images are greyed, and say that they are still uploading and are being processed. Some get the image loading error. When delete all the images and reload, it is not the same images that fail the image load test. This gives the impression that Apple does not value our time. There are 10 pages of people who have had this problem going back for over a year. This is unacceptable.
This is a server side problem and it is an embarrassment for apple not to even acknowledge the problem let alone fixing it. All developer-facing tools are hostile and issues filed using feedback assistant are completely ignored.
Please look each screenshots you uploaded, I found one and re-uploaded. It worked! Thanks!