This item has been identified as an outstanding known issue; a workaround is provided until the issue is officially fixed.
This issue occurs when trying to reset the list index for a list that meets the criteria detailed on the "Workspace Administration" Anapedia page (https://help.anaplan.com/anapedia/Content/Administration_and_Security/Workspace_Administration.html).
If the browser language or locale is set to something other than English, the Reset button will be greyed out and cannot be clicked.
Enter your browser settings/options and change the language to English. It can be changed back once the list has been reset.
If this workaround is not suitable in your use case, please contact Support at email@example.com.
Internal Reference: CORECLI-2529