The download function is broken after updating DNN to DNN9.1.1 and DMX to 06.02.03. I got the follwing error when I double-click on a file:
Chrome ("Specified page is not in this site.") , IE("Webseite wurde nicht gefunden- HTTP 400 ").

The URL has changed and there might be problem with the API. The old url is still working "../DesktopModules/Bring2mind/DMX/Download.aspx?Command=Core_Download&EntryId=24305&PortalId=10&TabId=1511" but the now url failures ".../DesktopModules/Bring2mind/DMX/API/Entries/Download?Command=Core_Download&EntryId=24305&PortalId=10&TabId=1511"

There is not useful log message (DNN-Log, Webserver-Events).

How can I solve this problem?

Thanks in advance for your help.

I reverted the dmx sql script to get the old url format for a quick fix:
UPDATE {databaseOwner}{objectQualifier}DMX_Extensions
SET ControlToLoad='Bring2mind/DMX/Download.aspx'
WHERE ControlToLoad='Bring2mind/DMX/API/Entries/Download'
GO

Nevertheless, the api call still failures.

I forgot to mention an error info during upgrade:
Info::Processing Cleanup File - 6.1.0
Info::ExceptionSchwabenCode.QuickIO.UnmatchedFileSystemEntryTypeException: FileSystemEntryType not matched! at SchwabenCode.QuickIO.QuickIOFile.InternalFileExists(String uncPath) at DotNetNuke.Common.Utilities.FileSystemUtils.DeleteFiles(Array arrPaths) at DotNetNuke.Services.Installer.Installers.CleanupInstaller.ProcessCleanupFile()
Info::Completed Processing of Cleanup File - 6.1.0
Info::Component installed successfully - Cleanup
Info::Starting Installation - Cleanup
Info::Processing Cleanup File - 6.1.5
Info::ExceptionSchwabenCode.QuickIO.UnmatchedFileSystemEntryTypeException: FileSystemEntryType not matched! at SchwabenCode.QuickIO.QuickIOFile.InternalFileExists(String uncPath) at DotNetNuke.Common.Utilities.FileSystemUtils.DeleteFiles(Array arrPaths) at DotNetNuke.Services.Installer.Installers.CleanupInstaller.ProcessCleanupFile()
Info::Completed Processing of Cleanup File - 6.1.5

The ':ExceptionSchwabenCode.QuickIO' error is a DNN bug which hopefully gets resolved quickly.

DMX 6.1 is not compatible with the latest versions of the platform especially if you were using the RadUpload provider in DMX. DMX 6.2 is now the latest DMX series tested on DNN 9.

Peter