No I had not and that solved the problem. Thank you! The README.md file I found in the Arduino library said this about that #define and so I assumed it would default to Serial:
The remaining variables are rarely used, but we list them here for completeness.
#### Changing debug output
#define LMIC_PRINTF_TO SerialLikeObject
This variable should be set to the name of a Serial-like object, used for printing messages. If not defined, Serial
is assumed.