I like your components, great work and I wish you to keep it up!
I have just been browsing your demos at [blazor.radzen.com], I was using the Upload component and I clicked Multiple, uploaded two random files I had on my desktop and Bang! Erro in the console.
I didn't realise it but one of the files I uploaded was a .exe: 382464 bytes, perhaps that caused it?
Thanks.
Perhaps it was a random thing, I don't think it's sersific to the uploads, I latter went on to the Dialog demos and I'm sure I got the same error there.
It could be because you are using server-side and my connection was lost somehow.