" An error has occurred during the all server configuration update process.
An error occurred running the command: 'Add-DSFeatureInstances'
The element identified by the instruction 'addElement' at (6,4) with attribute 'xpath', value '/configuration/container/componenets', already exists
At line:1 char:1
+ Add-DSPnaProtocolAuthentication -ParentInstanceID-------"
C:\Program Files\Citrix\Receiver StoreFront\Features\PnaProtocolAuthentication\admin\web.merge.config
Take a backup of web.merge.config file and remove it from that location.
Try to propagate the changes again from the first server.