Looks to be a CORS policy issue...
Access to XMLHttpRequest at 'https://<airport data provider>' from origin 'https://<your doamin>' has been blocked by CORS policy:
The 'Access-Control-Allow-Origin' header contains multiple values '*, *', but only one is allowed.
I'm looking for a solution. I haven't messed with this in over 3 years, so it may take a while - unless someone knows an easy fix.