Hi,
When you go to the demo for the upload control, all you have is the index controller posted. That does not contain the methods for the actual async uploads/ cancel. ASP.NET Core Upload Key Features Demo | Telerik UI for ASP.NET Core
Can you post these methods from the upload controller:
.Async(a => a
.Save("Chunk_Upload_Save", "Upload")
.Remove("Chunk_Upload_Remove", "Upload")
.AutoUpload(false)
.ChunkSize(11000)
)Thanks!