Sometime got this error when try to download files.
And after that I got this error
Hi @Gal_Saada 
How many files are you trying to upload and what type are they?
Did the upload succeed?
I got this error when trying to download a file not upload.
xslx file type.
Bad read 
Ok, to try to reproduce on my side, can you provide me more context about your architecture.
Like your DB, lumber version and how do you store your files.
Did you use the file picker widget?