how to correct this Challenge not yet complete in My Trailhead Playground 1 The field 'Loan_Amount__c' either does not exist on the Contact object or it is not of type currency.

Hi @Udochukwu Rejoice Nwuzor

Can you share a screenshot of the field configuration? 

Please make sure you created the field under the Contact object and that the API name is exactly the same as given in the unit. Also, check whether the field is visible to the System Administrator in field-level security.