Downloading or showing attachment ends with error

I was trying to shows attachment.

I was expecting showing attachment

Instead I’ve got error “Invalid non-ASCII or control character in header: 0x00E1“

{

  • “ClassName”: “System.InvalidOperationException”,

  • “Message”: “Invalid non-ASCII or control character in header: 0x00E1”,

  • “Data”: null,

  • “InnerException”: null,

  • “HelpURL”: null,

  • “StackTraceString”: " at Microsoft.AspNetCore.Server.Kestrel.Core.Internal.Http.HttpHeaders.ThrowInvalidHeaderCharacter(Char ch)\r\n at Microsoft.AspNetCore.Server.Kestrel.Core.Internal.Http.HttpResponseHeaders.SetValueFast(String key, StringValues value)\r\n at Microsoft.AspNetCore.Server.Kestrel.Core.Internal.Http.HttpHeaders.Microsoft.AspNetCore.Http.IHeaderDictionary.set_Item(String key, StringValues value)\r\n at Microsoft.AspNetCore.Http.ParsingHelpers.AppendHeaderUnmodified(IHeaderDictionary headers, String key, StringValues values)\r\n at Origam.Server.Controller.BlobController.Get(Guid token) in M:\\gitave\\origam.origam\\backend\\Origam.Server\\Controller\\BlobController.cs:line 166",

  • “RemoteStackTraceString”: null,

  • “RemoteStackIndex”: 0,

  • “ExceptionMethod”: null,

  • “HResult”: -2146233079,

  • “Source”: “Microsoft.AspNetCore.Server.Kestrel.Core”,

  • “WatsonBuckets”: null

}

The file name is causing a problem. When the file name is “Obrázek WhatsApp, 2025-05-05 v 08.17.59_7ba3d48d.jpg” or “Snímek obrazovky 2025-08-05 212236.png”, the file can’t be downloaded or displayed.

What version of Origam are you using?

Version of Origam is 2025.9