Error whith WHMCS Wordpress integration

Sorry for my English.

Problem: I install WHMCS WP integration and only I can see this Message:

"Sorry this doesn’t look like a WHMCS site at [https://clientes.techlegal.es/] 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."

The url https://clientes.techlegal.es is correct

Thanks