Jira User Picker Error

[Junseok Lee]

I'm using the user-picker to search for Jira users. But Up to version 8.11.1 works well, but from 8.12 then on the following errors occur:

<input type="text" id="cv-bg-admin-manager-form-userpicker" class="single-user-picker js-default-user-picker disabled"  placeholder="">

Please give me some advice. Thank you