Button shortcode not going to the correct URL

I’m using Optimizer Pro 3.8.

I am not able to get the button shortcode to go to the correct URL.

When I’m at https://www.createitwebdesigns.com/about and click on the contact me button, it takes me to https://www.createitwebdesigns.com/about/www.createitwebdesigns.com/contact

The HTML code is:
Have a question and want to find out more? Drop me a line. [button text="CONTACT ME!" url="www.createitwebdesigns.com/contact" background_color="#ffffff" text_color="#ffffff" style="lt_hollow" size="default" icon="" open_new_window="true" rounded="true"]

How do I get the URL in the button shortcode to not append but refresh to a new URL?
Thank you,
Jessica