While integrating google maps using angular-google-maps 2.3.1 with lodash 4.3.0 (Custom Build) , I am getting this error.
From some links I got to know they have some issues in latest version but I am not able to find the exact reason behind this issue.
As I post in a comment, I had the same problem and I solved it downgrading
lodash
until version3.8.0
.Not sure why version 4.x doesn't work properly at the moment.