[File Upload] Upload Error "http error (404)"

[File Upload] Upload Error "http error (404)"

  
Forge Component
(12)
Published on 27 Aug by João Carvalho
12 votes
Published on 27 Aug by João Carvalho
Used this forge added to reference,

After I select the file, it shows the progressive bar uploading, then when its at 100% it says ... file name... - http error (404)

then disappeared

Same error if uploaded by manuelly 

I went into service center found an error

"'/my application name/MultiUpload.aspx' does not exist."