The name of a project suite's element (the project suite itself, a project, a project item, a test log and so on) defines the name of the file where the element's data is stored. In Windows, the maximum length of a file path is 260 characters.
This message indicates that the element name you have specified corresponds to a fully-qualified file name that exceeds the maximum path length. To solve the problem, specify a shorter name for the element so that the corresponding fully-qualified file name does not exceed the path length limit.