I think this is the problem: you have two versions of ESP8266WiFi installed, and they might be conflicting. Remove the first one (in C:\Users\ajn\Documents\Arduino\libraries\) and try again.
I think this is the problem: you have two versions of ESP8266WiFi installed, and they might be conflicting. Remove the first one (in C:\Users\ajn\Documents\Arduino\libraries\) and try again.