Exception encountered adding or removing users.
This error message is displayed when a dataset reference between a test and a dataset is broken. Whenever a dataset is used, a reference is created in the test. The reference is a link that points to the physical dataset file in the test project. This link can break if the test is copied or imported into another project without copying or importing the associated dataset file. This link can also break if the dataset file is deleted.
Do not copy or import individual test assets. Instead, copy or import entire projects. If you have already copied or imported individual test assets, copy the dataset from the previous project or create a new dataset that contains the same information. Open the test with the broken reference and link the dataset to the test. \nDo not delete dataset files.