How to export record type of salesforce to excel

Hi all,

I'm a beginner of Appian.

I usually see a "export excel" button in a record type at the upper right corner, but I could not see it on a record type.

In the record type, the following error is shown.

"Expression evaluation error at function a!gridField_23r3 [line 51]: The field [b4975317-48bc-4a6d-9ade-949dece38b46] does not exist."

In record type, I cannot see expression code, but the error show the code line...

How do I see the code in a record type?

What i want to do is to export a data into excel... any suggestion please...

Best regards,