Create a Lead Validation Rule

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Getting this error:   Challenge not yet complete in Michelle's Playground

An unexpected error occurred while testing different scenarios. We were unable to insert or update leads as expected. Check your org for other customization that might interfere with lead creation or update, then click "Check Challenge" again. If this continues, contact the Trailhead Help team.

AND(

ISBLANK(Phone),

ISBLANK(Email))

• Create a Lead validation rule:
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  • Rule Name: LEAD001_Email_Or_Phone_Required
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  • Give your validation rule a good description.
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  • Determine the formula that requires either the email or phone field to be populated when a lead is created or when it is edited and either the email or phone field has been changed.
  •  
    • Hint: use the ISNEW, ISCHANGED, and ISBLANK functions.
  •  
  • Error Message: Either Email or Phone are required [LEAD001]
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  • Error Location: Top of Page