there, I'm trying to add a link to a product description

Hi there,

I'm trying to add a link to a product description in WHMCS. The link works fine when I visit WHCMS directly, but when I visit the same page via Wordpress using the integration plugin, the URL for the link is all messed up. Upon clicking it it gives me a:

"WHMCS Integration: A valid URL was not provided."

How can I add links in my product descriptions that work via wordpress?

Thanks!