am re-posting this question as really want to complete this pset and cant find a solution. Have managed most of the problem set without a working map but now need to test markers. After running flask the map shows briefly before i get “opps something went wrong”. I have checked the java console and am having the “RefererNotAllowedMapError” I have tried update50 and re-downloading the source code (with provided api key) but result is the same. I'm not sure this is down to not being on the referrer list as from reading documentation i assume cs50 have used a wildcard to allow all ulrs ie. "http://ide50-*" or alike. my ulr is http://ide50-USERNAME.c9users.io:8080/ Really would like to complete this problem set so if anyone has had the same issue and a fix please let me know. Many Thanks