No Match:Opponent(opponent_name)

The value supplied for the Opponent (opponent_name) doesn't match an existing opponent in WH.  Either the name is misspelled or the opponent hasn't been created yet.

Invalid data:Column Required(location_name);Column 'location_name' does not allow nulls.

One of the required fields (location_name) is not populated.  This can also result from blank rows included in the data file.

Input string was not in a correct format.Couldn't store <> in travel_time Column.  Expected type is Int32.

The field travel_time expects integers.  If additional information (such as the text "minutes") is included in that field, it will produce this error.