Google Maps 10.4 New Build

I had a project just finished in 10.3 . Built and everything worked. Just noticed after building with 10.4 that I get internal server error with my two pages with google maps integrated . This is with insert a map field.
Any Ideas. If I take the maps out . the page loads . can't debug as it is a 500 error.

Had to be the google maps API keys itself , as it just started working again. google maps must have been down momentarily . Solved.
UPDATE: This is an issue . If you delete older google maps from 10.4 then save the project , I loose all functionality of google maps upon new insert. Please advise . This is a live project and have upgraded it to 10.4 with new functionality .
do not want to go back. Turns Out Clustering is not working with google maps in 10.4. Something is amiss. Just went to regular markers. 3 hours wasted . really frustrating. Not sure it works with regular icon's default. Clustering is not being pulled form google or there must be a build issue then. So Google or PHPrunner. Not Sure . but can do without clustering I guess.