Issue: NodeXL Crashes and displays “Object reference not set to an instance of an object”
A common cause for this issue is the location of the NodeXL Pro License key.
Delete the current NodeXL Pro license key.
Find the email that was sent with the initial NodeXL Pro license key attached.
Copy the NodeXL Pro License Key to the local file system. A good place is a folder created on the desktop called “NodeXL Pro”.
Restart NodeXL Pro. It will ask for the location of the NodeXL Pro License Key. Once that is provided, it should work properly.
There are several other possible solutions to this problem. If these steps do not resolve the issue, please install TeamViewer and send a message with the Team Viewer ID and Password to firstname.lastname@example.org and we will fix the problem as soon as possible.