Edit the following file to set the maxRequestLength to it's max value:
"C:\Program Files (x86)\riteSOFT\riteSCAN Administration\Web.config"
Locate the section shown below and add the maxRequestLength or modify the existing value:
Note: If this does not resolve the error, please uninstall the riteSCAN Administration application on the Server and then reinstall it. Ensure that you have the installer for your existing version of riteSCAN available before