Lightroom SDK 8.0 mymetadata plugin doesn't work

Hi All,

I want to work with Metadata. In Sample Plugins, there is an example related to metadata.

I installed that plugin. I can see the My Metadata in Metadata drop-down but when I select it I cannot see the defined metadata values.

According to SDK Guide, The Plugin should work like below

However, it works like below

any idea or clue?

Thanks in advance