Help with setting up a roster

OK, so I loaded gbmoore's NFL 2017 quickstart. Searched for all players and then exported them to a .json. When I try to start a new career league using that .json none of the rosters load. I checked the log and here is the error message I'm getting:
What am I doing wrong?
Date: 9/11/2017 9:48:42 AM
Source: Draft Day Sports - Pro Football 2018
Message: Object reference not set to an instance of an object.
Stack Trace: at #=qMifSVnGHz6Pce_t$ZQPjFkay$JB3a_P4lQbS9c96Q4k=.#=qqWQhY6NOKddPqvVEBcRNMA==()
at #=q2W6oeRuP_sgDEiWE2xiUoA==.#=qT4hgJYr6bgvQqkWO8Qb7uRRCVyYtnazvHu0pf2hMLeU=()
at #=q2W6oeRuP_sgDEiWE2xiUoA==.#=qLknmlKGxtdITUiRDSkNQUg==()
at #=q8qpgXxVcXfUG3O09ZQpJsg==.#=qKqTF$FtNyi7rRTx7KIKKcA==(Object #=qBIj9ugx1H_QpXXHpfu3KAA==, EventArgs #=qh7j90KBT5zdBy9b2W_8d6g==)
at System.Windows.Forms.Control.OnClick(EventArgs e)
at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)
at System.Windows.Forms.Control.WndProc(Message& m)
at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
What am I doing wrong?