In order for WP Google Maps and most other WordPress plugins to function correctly, jQuery needs to be installed in the front-end of your theme.
In order to ensure that jQuery is installed in your theme, please follow these steps:
- Log into the admin section of your WordPress site.
- Locate the Appearance link in the left navigation panel and click on “Editor”
- Locate the “header.php” file in the list on the right side of the page and click on it
- Find the line “wp_head();” and just above it, paste the following line of code:
- <? php wp_enqueue_script(“jquery”); ?>
- Your header.php file should look something like this:

or this

For a more detailed article of how to correctly include jQuery in your theme, please review the following article by Chris Coyier, Including jQuery in WordPress (The Right Way)
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