Like I said before,
acf/load_value doesn’t know the field name yet, so you need to use the field key.
To get the field keys, kindly open the field group editor page and click the “Screen Options” menu. In this menu, please enable the “Field Keys” option for ACF PRO version or set the “Show Field Key” option to “yes” for the free version. I’ve attached a screenshot for your reference.
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