{"record":{"id":"d95b62b225b488bb","repo":"stride3d/stride","slug":"content-serializer-for-url-could-not-be-found-was-expecting","errorCode":null,"errorMessage":"Content serializer for {url} could not be found. Was expecting to find type {objType} but the actual type of the resource was {headerObjType}","messagePattern":"Content serializer for (.+?) could not be found\\. Was expecting to find type (.+?) but the actual type of the resource was (.+?)","errorType":"exception","errorClass":"InvalidOperationException","httpStatus":null,"severity":"error","filePath":"sources/core/Stride.Core.Serialization/Serialization/Contents/ContentManager.cs","lineNumber":461,"sourceCode":"            // File does not exist\n            // TODO/Benlitz: Add a log entry for that, it's not expected to happen\n            if (stream == null)\n                return null;\n\n            Type? headerObjType = null;\n\n            // Read header\n            var streamReader = new BinarySerializationReader(stream);\n            var chunkHeader = ChunkHeader.Read(streamReader);\n            if (chunkHeader != null)\n            {\n                headerObjType = AssemblyRegistry.GetType(chunkHeader.Type);\n            }\n\n            // Find serializer\n            var serializer = Serializer.GetSerializer(headerObjType, objType);\n            if (serializer == null)\n                throw new InvalidOperationException($\"Content serializer for {url} could not be found. Was expecting to find type {objType} but the actual type of the resource was {headerObjType}\");\n            contentSerializerContext = new ContentSerializerContext(url, ArchiveMode.Deserialize, this)\n            {\n                LoadContentReferences = settings.LoadContentReferences,\n                AllowContentStreaming = settings.AllowContentStreaming,\n            };\n\n            // Read chunk references\n            if (chunkHeader != null && chunkHeader.OffsetToReferences != -1)\n            {\n                // Seek to where references are stored and deserialize them\n                streamReader.UnderlyingStream.Seek(chunkHeader.OffsetToReferences, SeekOrigin.Begin);\n                contentSerializerContext.SerializeReferences(streamReader);\n                streamReader.UnderlyingStream.Seek(chunkHeader.OffsetToObject, SeekOrigin.Begin);\n            }\n\n            if (reference == null)\n            {\n                // Create Reference","sourceCodeStart":443,"sourceCodeEnd":479,"githubUrl":"https://github.com/stride3d/stride/blob/96fad776d210c221682aac1ccdf4c79dc046fc38/sources/core/Stride.Core.Serialization/Serialization/Contents/ContentManager.cs#L443-L479","documentation":"Serializer resolution failure in ContentManager.DeserializeObject: no content serializer matched the url, and the mismatch is diagnosed as the file's stored type header differing from the requested type — the on-disk resource is not of the type the caller expects.","triggerScenarios":"Thrown at sources/core/Stride.Core.Serialization/Serialization/Contents/ContentManager.cs:461 when the library encounters an invalid state.","commonSituations":"See trigger scenarios.","solutions":["Request the type actually stored in the file (per the header) instead of the current expected type","Recompile/re-export the asset with the expected type","Verify the url points to the intended asset and isn't shadowed by another file"],"exampleFix":null,"handlingStrategy":"validation","validationCode":null,"typeGuard":null,"tryCatchPattern":null,"preventionTips":[],"tags":[],"backgroundTag":null,"analyzedSha":"96fad776d210c221682aac1ccdf4c79dc046fc38","analyzedAt":"2026-09-14T02:59:31.279Z","contentChangedAt":"2026-09-14T02:59:31.279Z","schemaVersion":2},"datasetVersion":"2026-09-23T08:17:48.524Z"}