1. In Theme Options – General– Appearance – the option for Property List Type for Taxonomy pages must be set to Half Map:
This will apply for all custom taxonomies: category, what do you want to rent, city and area.
2. And from Theme Options – General– Header you must make sure Media Header Type? – is set to Google Maps:
IMPORTANT: For map to load on half map pages is mandatory to setup Media Header Type to google map from theme options.