WHMCS BRIDGE not working

While the look of the whmcs plug in looks very good. I wish it would actually work and that there were no changes made to my folder of whmcs. Currently with using this plug in users are able to check site availability, but it doesn’t add the user domain to the shopping cart. The cart actually won’t come up at all if it’s anything beside my service packages. In addition if a customer request a password reset it just takes them back to the page that handles the plugin. Anyone run into this problem and was abe to resolve it? If so how, it seems it would be a cool plug in if it worked correctly, so I’d really like to use it.

https://wordpress.org/plugins/whmcs-bridge/