Implement Best Practices said: The Lead validation rule named ‘LEAD001_Email_Or_Phone_Required’ is not set to display at the top of the page. and I´ve check the buttom of top part

@María Sánchez okay. I think I understand what the problem is. Since you have chosen Spanish as your language, errors often occur when checking tasks. Therefore, to avoid errors, you need to choose English for both Trailhead and your Salesforce org.

To do this, you need to:

For Trailhead:

For SF Org:

Sincerely, 

Mykhailo Vdovychenko 

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