Hello, I'm getting the following error:

Challenge Not yet complete... here's what's wrong: 
The 'projectRef__c' field is not configured correctly as an Indirect Lookup field.

I've googled it and tried every solution but I can't fix it.

Here is how I've got configured the External Object:



Something weird is that I'm in the last step and I have no data on the Project object. I've done Validate and Sync but nothing.

Thanks!!