Uploading screenshots to App Store Connect fails

Uploading screenshots for an update to my app is consistently failing today. Dragging and dropping the image into the field shows the spinner fill then the image appears. The save button never enables.

If I change some other metadata the save button appears. Clicking it works but then the "uploaded" image has a big red explanation point on it. Hovering the image states IMAGE_TOOL_FAILURE.

Is there anything I can do on my end to get this working or is it a bug in App Store Connect? Any help would be greatly appreciated!
This is a bug in App Store Connect. Today I have uploaded screenshots, they have the spinner on them and then they appear. I can rearrange the order. Then randomly they are being replaced with a red box with red exclamation point and the IMAGETOOLFAILURE on hover.
Having the same issue as reported by Sionnagh 
Is there any news about this? It's also happening to me.
I use GIMP to paste my macOS screen shots and export them to png. I also met IMAGE_TOOL_FAILURE problem. Finally, I work around this problem by changing one GIMP png export option from "automatic pixelformat" to "16bpc RGBA!" However, I don't know what happened.
"This is a bug in App Store Connect. Today I have uploaded screenshots, they have the spinner on them and then they appear. I can rearrange the order. Then randomly they are being replaced with a red box with red exclamation point and the IMAGETOOLFAILURE on hover." <- This also happened to me. Is there anything to do to fix this?

Same issue here!

Also having the same issue

can anyone get the solution?

Same issue here!

Any tips? can't upload a new version because of this...

Same issue here

Also having this issue

same issue here :(

I was able to resolve this by changing my local file name to have a -1 and re-uploaded the image. This worked fine. It appears this issue happens when uploading multiple screenshots at once. Only 1 image is uploaded and the others appear as errored. If you remove these, I think Apple must be still storing the file names somewhere. It seems like the bug keeps occurring when you upload the same file name

Dealing with the same challenge: after uploading the screenshots they appear. Then randomly they are being replaced with a red box with red exclamation point and the IMAGETOOLFAILURE on hover.

Uploading screenshots to App Store Connect fails
 
 
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