is someone can help me?

You are not providing the basic information as requested for support specifically the version of b2evo you are using and the version of php the server is using. Please provide that.

In b2evo version 7.1.5 the line reffered to has the following code.
` return $this->params['sourceIp'] ?? null;
so in that version the message must refer to one of the question marks.

Reading https://stackoverflow.com/questions/53610622/what-does-double-question-mark-operator-mean-in-php you will see information about the double question mark, but can't help you further yet.