By default a client can’t upload files in plesk file manager larger then ~30MB . Unfortunately we have to let them upload bigger files because they like to use the archive “uncompress” feature from file manager.
The error received in plesk is:
HTTP Error 404.13 – Not Found
The request filtering module is configured to deny a request that exceeds the request content length.
All you have to do to solve this :
%windir%\system32\inetsrv\appcmd set config “PleskControlPanel/” -section:requestFiltering -requestLimits.maxAllowedContentLength:104857600
which will set a 100MB limit for file uploads in plesk file manager.