You may be receiving an error in your Academic Course data import regarding School Year Set Up type and Grade Plan Group because these columns have the incorrect information pulling from what's in the system.
To find what information needs to be added to the file for School Year Set Up Type, navigate to:
onRecord > Settings > Grading > Grade Plan Groups
Look at the Style dropdown. If the style being used is Standard, you will enter Standard under the grade plan group type column. If it is Assessment, you will put Assessment under the grade plan group type column and so on.