This calls out an older version of the SDK, that has to be updated, and once you do that, you must update line 98 of form1.cs
from
string infoAndDecodedData = $"{e.DecodedData.SymbologyName}:{e.DecodedData.DataToUTF8String}";
to
string infoAndDecodedData = $"{e.DecodedData.DataSourceName}:{e.DecodedData.DataToUTF8String}";