Back in November I've exported some campaign pages from https://release.k8s.p4.greenpeace.org/international/ to save them from the sync of prod > staging, now I've reimported them to the same instance and some images were not imported. I've attached the XML and a screenshot of the error message. I'm fixing now the images on the campaign pages so you won't find any missing ones but if you import it as a new page after renaming the title in the XML (<title>All available blocks</title>) then you should be able to reproduce it.