When attempting to duplicate or copy/paste an experiment inside a notebook the following error will be displayed: "Error Duplicating. Sorry, Object reference not set to an instance of an object."
Creating a new experiment and all other workflows do not present any problems.
Solution: This issue can be seen when the original notebook was created inside a folder not under a user. To fix the issue please follow these steps:
1. Log into E-Notebook as an administrator user
2. Navigate to the folder where the notebook was created
3. Open the folder's 'Collection Properties'
4. In the 'Security' tab grant the user 'Read and Write' on 'All Items'