Can't successfully insert people’s names into people fields on next-gen project Edited

[Ivory Chia]

Hello all, I've created a next-gen project for my team and added a people field as a custom field. However, when I try to insert people's name into this field, the system keeps showing "no options". 

Any solutions? Thanks! 

[Jack]

So if you begin to type a person’s name nothing is displayed by auto-complete? Be sure to try this with a person you are sure is in the project. You cannot add names of people that don’t have project access. If you can make the person the assignee they should be available for the custom people field.

[Ivory Chia]

Yes, I'm sure I try this with a person in the project. However the person's name still doesn't displayed by auto-complete...