iPhone model: iPhone 14 Pro Max 512GB iOS version 26.6 Merlin app version: 7.0.0 (178) The date and time of the failure Your diagnosis is clearly narrowed down: The error only occurs in the iOS mobile app; web version, permissions, file format, installation and login have already been checked. The error remains unchanged. Uploading the same image works in the browser with the same account, but immediately fails with an exclamation mark in the iOS app. Please escalate the case to the iOS development team and review the native file/URI upload path.