22A Feature - Use skills to define the audience for a recruiting campaign

Summary:

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22A release has a feature to add skills to define audience for a recruiting campaign. However, we keep getting an error as highlighted in screenshot below if we try to add a skill manually. Has anyone tried to test this feature in lower instance or aware how to get this working?

Version (include the version you are using, if applicable):

22A

Code Snippet (add any code snippets that support your topic, if applicable):