Knowledgebase​ links

I have my WHMCS set up on a subdomain and do have the link set up properly in the bridge settings but when I go to the Knowledgebase​ and click on a Categories the Knowledgebase​ link does not have the subdomain link so it returns a 404 error.

How can I fix this?

https://ww.wp.xz.cn/plugins/whmcs-bridge/