Create a process to update child record when the parent is updated. I've tested the PS I created and it works fine and yet when I check the challenge I recieve the error below:

ERROR:
Challenge not yet complete... here's what's wrong: 
There was an unexpected error in your org which is preventing this assessment check from completing: System.DmlException: Insert failed. First exception on row 0; first error: FIELD_CUSTOM_VALIDATION_EXCEPTION, First Name is required: [FirstName]

Create a process to update child record when the parent is updated. I've tested the PS I created and it works fine and yet when I check the challenge I recieve the error below:

ERROR:
Challenge not yet complete... here's what's wrong: 
There was an unexpected error in your org which is preventing this assessment check from completing: System.DmlException: Insert failed. First exception on row 0; first error: FIELD_CUSTOM_VALIDATION_EXCEPTION, First Name is required: [FirstName]