Content Manager Teams add-in displays error 'A value must be entered for the 'Author / Signatory' when there is already a valid location entered.

We are using Content Manager 23.4 Patch 1. 

When we save Teams chat, Teams add-in displays the form. However when we click on 'Save' button, error messahe - 'A value must be entered for the field 'Author / Signatory' is displayed. Aithory / Signatory is a required field but there is already a valid location selected for this field. 

Anyone encountered this issue or have an idea of how this issue can be resolved.