Default udp_listen_addr value preventing start_receiver() on MacOS

The function start_receiver() is encountering an error when attempting to use the default udp_listen_addr value. This issue is preventing the code from running as intended, and can be observed when executing the following code:

start_receiver(
        connect_addr='aisdb.meridian.cs.dal.ca:9920',
        sqlite_dbpath='AIS.sqlitedb',
        stdout=True)

The error message: