Error from CCV "Where do I find this?" link

When clicking on "Where do I find this?" link next to the ccv field I get

Sorry this doesn't look like a WHMCS site at [https://example.com/] Make sure your WHMCS Integration settings are pointing to the correct URL and that the WHMCS site is set for the Portal template in Setup | General.
Was browsing the forum and the solution for theirs was to use correct html entities or utf-8 encoding, in my case though I get that with an image . How would I fix that?