I seem to be having the same issue where all I get is the Green Box of Death.
I have set "Always include JS in header" to yes, and verified that I have the #MAP included in the Default Single Event Format:
<p>#M #j #Y - #H:#i</p><p>#_ADDRESS</p><p>#_TOWN</p><p>#_NOTES</p><p>#_ADDBOOKINGFORM</p><p>#_MAP</p>
I am using a theme from ElegantThemes but I can't find any area where google maps are referenced in the theme itself.
I've also reviewed the documentation included with the plug-in and the link referenced in the post above.
here is the url: http://qcyoga.com
Thanks for the great plug-in.