I was just trying to add a new license in to my vRSLCM (vRealize Suite Lifecycle Manager) v8.0.1 instance when I hit upon the following error:

Exception while loading DLF. Check logs for more detail.

Not the most helpful of messages! Of course, the first rule of technology is “turn it off and on again”. After rebooting the vRSLCM appliance I tried again and it worked without issue.