Error when adding a custom attribute

Hello,

I need some support, I have a Success source here and I configured a custom attribute customString1 and it doesn’t bring any information.

I tried the path in the doc https://api19preview.sapsf.com/odata/v2/PerPerson?$select=customString1, but I still have problems bringing the information.

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I tried all these steps above, and I got this log

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