Almost 100 messages of "WARN -- : Unable to parse JSON String for" in log file

[jonespm]

There's a warning when a course search fails. It just returns the value

[]

which is not valid JSON but is just an empty list. This is fine and shouldn't be treated as a warning. We should have a check for this to avoid the warnings being printed in the output log file.

Fixing this would help us to identify potential real warnings in the logs.