DocuWare Request is created up to 99%. At the end instead of a success  message the  Symbol is displayed. Via mouseover you see the real error:

"Cannot determine DocuWare Request upload location!" Neither storage location nor FTP is available"

Please make sure that the Windows user starting the Workflow server has access rights on the Request storage location. Maybe it is necessary to support the access with a shared folder and according rights to access this share.