This article provides a solution for the following error that may appear:
Unable to build URL for file: ...
This is a stack trace error and can appear when attempting to deliver a report with attachments while having Demo mode enabled. To resolve this, navigate to Lasernet > Setup > Parameters > Performance and disable Demo only!.
The best practice is to have Demo mode disabled in customer environments.
The Demo mode will provide the Azure Account key and Azure Account Name in the JobInfos. The advantage to using it is that we can get up and running just by importing the demo setup.
The following is an excerpt on this feature from the "Lasernet Connector for Microsoft Dynamics 365 for Operations - Configuration manual":