I've created a simple helper override, with just a constructor method using a var dump.
When I try to access the contact page I see a message error like that below.
I didn't implement anything just a simple override, I have certain that the structure it's right, I just call the helper in the contact
form.phtml, when I call other helpers it's working well. So I guess that it's an external issue with that module.
Exception #0 (Exception): Recoverable Error: Object of class Vendor\Override\Helper\Infortis\AddToLinks could not be converted to string in app/design/frontend/Infortis/ultimo/Magento_Contact/templates/form.phtml on line 10
How can I solve?