Hi
I'm getting this error message when trying to check the challenge inMap Your Workflow Criteria to Process Criteria
https://trailhead.salesforce.com/content/learn/modules/workflow_migration/workflow_migration_criteria
I created a new  DE but I'm getting the same error message once and again.
can you help me please?

thanks

There was an unexpected error while verifying this challenge. Usually this is due to some pre-existing configuration or code in the challenge Org. We recommend using a new Developer Edition (DE) to check this challenge. If you're using a new DE and seeing this error, please post to the developer forums and reference error id: OPBHDLAG

YOUR CHALLENGE
Create a process to replace two workflow rules
The stars have aligned, and you finally have the time and buy-in to convert some workflow rules to processes. You're converting two Opportunity workflow rules into one Opportunity process. The evaluation criteria for both of the workflow rules is "created or edited to subsequently meet criteria." Create a process and configure the appropriate settings in the Object node to match the workflow rules. Note: Don't work in the Criteria node yet. In the next unit, the hands-on challenge asks you to add criteria and actions to your process.
Process Name: Opportunity Management
Start the process when: a record changes
Object: Opportunity
The process must evaluate both created and edited records
Challenge not yet complete in joni@testlogin.com
There was an unexpected error while verifying this challenge. Usually this is due to some pre-existing configuration or code in the challenge Org. We recommend using a new Developer Edition (DE) to check this challenge. If you're using a new DE and seeing this error, please post to the developer forums and reference error id: OPBHDLAG

Step 1/

 

Step 2/



Step 3/



Step 4/ 

ACTIVATE


 

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]

The challenge is:

You've been given a requirement to keep Contact addresses in sync with the Account they belong to. Use Process Builder to create a new process that updates all child Contact addresses when the address of the Account record is updated. This process:Can have any name.
Must be activated.
Must update Contact mailing address fields (Street, City, State, Post Code, Country) when the parent Account shipping address field values are updated.

I start with Accounts when records is created or edited.
Filter criteria where accounts shipping address (street, city, state, zip code) is changed (used "or" logic).

I am stuck on the next step "add action".  I started with action type "Update Records".
On objects, I can't seem to change Accounts to Contacts.  Why?