Uncaught Typeerror: Cannot Read Property 'addlayer' Of Undefined

I'm trying to use leaflet markercluster. but when I run it, gives me an error as: Uncaught TypeError: Cannot read property 'addLayer' of undefined my code in functions.js is: for

Solution 1:

I called the Init_Map(); function in the last part of my markerclustering function and it just worked