Hi Gleb
You are right, there where some sensitive data, which are luckily outdated. But I will have to check next time better, what is in the upload.zip …
As you see in the attachment, I upload the files and then I create manually entity by entity with the fileref.
Upload.zip (234.3 KB)
As it is documented in upload :: Jmix Documentation I did expect, it should work too 
So the visual component upload is not supported in Jmix 2.8 ?
Regards
Felix