Hello! I'm working on an app that generates CSV files in memory and allows users to export them through a ShareLink. I am using a custom UTType for my CSV files as .commaSeparatedText exports a .txt file, and a custom UTType was proposed as a workaround here: https://www.hackingwithswift.com/forums/swiftui/sharelink-problem-with-csv-file/21194. The app works on a development build, albeit with a lot of entitlement and sandboxing errors, but fails in production (sideloaded archive). Development errors are as follow: Error acquiring assertion: <Error Domain=RBSServiceErrorDomain Code=1 "(originator doesn't have entitlement com.apple.runningboard.primitiveattribute AND originator doesn't have entitlement com.apple.runningboard.assertions.frontboard AND target is not running or doesn't have entitlement com.apple.runningboard.trustedtarget AND Target not hosted by originator)" UserInfo={NSLocalizedFailureReason=(originator doesn't have entitlement com.apple.runningboard.primitiveattribute AND originator doesn't have entitlement com.apple.runningboard.assertions.frontboard AND target is not running or doesn't have entitlement com.apple.runningboard.trustedtarget AND Target not hosted by originator)}> (501) personaAttributesForPersonaType for type:0 failed with error Error Domain=NSCocoaErrorDomain Code=4099 "The connection to service named com.apple.mobile.usermanagerd.xpc was invalidated: failed at lookup with error 159 - Sandbox restriction." UserInfo={NSDebugDescription=The connection to service named com.apple.mobile.usermanagerd.xpc was invalidated: failed at lookup with error 159 - Sandbox restriction.} Received port for identifier response: <> with error:Error Domain=RBSServiceErrorDomain Code=1 "Client not entitled" UserInfo={RBSEntitlement=com.apple.runningboard.process-state, NSLocalizedFailureReason=Client not entitled, RBSPermanent=false} The additional production error I'm encountering is the following: Type "com.sunkensplashstudios.VRCRoboScout.csv" was expected to be declared and exported in the Info.plist of App.app, but it was not found. I have, to the best of my knowledge, declared these data types properly: Relevant code is below: extension UTType { static var CSVData: UTType { UTType(exportedAs: "com.sunkensplashstudios.VRCRoboScout.csv") } } struct CSVData: Transferable { var csv_string: String static var transferRepresentation: some TransferRepresentation { DataRepresentation(exportedContentType: .CSVData) { csv in csv.csv_string.data(using: .utf8)! } } } ShareLink(item: CSVData(csv_string: csv_string), preview: SharePreview("VRC RoboScout Scouting Data.csv", image: Image(systemName: "tablecells"))) { Text("Download").padding(10) .background(settings.accentColor()) .foregroundColor(.white) .cornerRadius(20) } Any ideas?