course instructions: User role reference selector-> input reference set selector

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In course https://academy.mendix.com/link/module/182/lecture/1409/2.3.4-Build-the-Detail-Pages---Create-the-New-Page instructions should be reworked and made more precise, it took me hours to figure the problem out. input refernce set selector is required for User Role and reference selector (I hope) for language.
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