Unexpected Error with Formula Fields

Question

I have set up the formula field "Days Since Last Update" but when I check the challenge, I receive the following 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: REQUIRED_FIELD_MISSING, Required fields are missing: [Demo__AccountID__c]: [Demo__AccountID__c]

Any insights would be appreciated!

Amit Chaudhary · Answer

Two issue i found in your case

1) it look like you enabel the name space "demo" in your org. If yes then that will better if you can create new developer account and use same

2) And you are using custom field Account.

your formula should be like below in case object.

(Today()- Account.LastActivityDate)

Please check below post for screen shot

https://developer.salesforce.com/forums/?id=906F0000000BSUKIA4

https://developer.salesforce.com/forums/?id=906F0000000BQwUIAW

Please let us know if this will help you.

Thanks

Amit Chaudhary

Unexpected Error with Formula Fields

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