[Plugin: WP Highrise Contact] 'You need to enter valid Highrise credentials in order" Erro

Hi everyone,

Getting the following red error message at all times, even though I know that the details are correct.

You need to enter valid Highrise credentials in order for the form to integrate with your Highrise account:

Any clue to the problem?

Thank you all in advance.

Alex

https://www.ads-software.com/extend/plugins/wp-highrise-contact/