The error message 'Settings must be of form "name=value".' may appear when setting up a D365 FO On-prem environment with file system type connections.
This error is caused by having 'Demo only! Use open azure storage links for images and attachments' enabled in Lasernet > Setup > Parameters. This issue occurs because the demo mode will try to use an Azure connection to communicate with Lasernet by providing the Account key and Azure Account Name in the JobInfos section of the XML. However, On-prem solutions do not use Azure-type connections.
To resolve this error, navigate to Lasernet > Setup > Parameters and disable 'Demo only! Use open azure storage links for images and attachments'.