Customer cannot create reports from the custom dashboards (portals) created by dragging views into the "Create Dashboard" Dashboards.
1) In the left hand pane select Create Dashboard
2) Drag views from the left hand pane Views tab to the new dashboard
3) Select Create Report in the left hand pane
In the create report window the option to create a report based on this dashboard is not selectable
If you choose a default dashboard like Hosts then this option works
This is due to the drag and drop dashboards are Portals not Dashboards as listed in the definitions.
Fixed in Foglight 5.6.10
Please note: The "Create a Report Based on the current Dashboard" option is only applicable if your dashboard has Parameterized inputs
Please refer to this KB article for details Foglight Knowledge Article 83389