Uncaught TypeError: Cannot read property 'getNorthEast/getBounded' of undefined

[MKJLM]

Hi,I get this Google Maps error message : "This page didn't load Google Maps correctly. See the JavaScript console for technical details." On a Google Chrome Console I get this error message: "Uncaught TypeError: Cannot read property 'getNorthEast' of undefined" or "Uncaught TypeError: Cannot read property 'getBounded' of undefined". I've try with Google Key API credentials after 5 minutes,but not working! How to fix it?

Update: On Google Chrome not working,but on Firefox working!