In our case, we have on-prem application and the solution was to update web.config with following:
Modify the maxAllowedContentLength setting in the web.config
You can increase the maximum file size by modify the maxAllowedContentLength setting in the web.config file:
<requestLimits maxAllowedContentLength="2147483648" />
With the above maxAllowedContentLength, users can upload files that are 2 GB in size. This setting will work right away without restart IIS services.
File a support ticket for it. It has something to do with the maximum file size or time-outs in the webserver where your app resides. It looks like the stream/pipe is broken. Or maybe the disk space is not enough in your cloud slot.
What is the max file size you can upload?