Getting error in Index.ts( Module is not decalred)

import { IProps, MultiSelectControl } from "./MultiSelect";

import { defaultProps } from "react-select/src/Select";

The manifest file provided by is working on singleLine of text but according to our filtering criteria we have modifed it to Lookup.Simple so that we can later use Javascript to get contacts whicch are associated with account and resloved some type error but above two lines is giving error with module is not decalred and 'defaultProps', 'Multislect' are used but not never declared.

We are using this pcf on field of appointment entity to get muli contact in that field. This entities also have account lookup and based on account we need to filter solution.

Can you please look into this issue and also if you can provide altenative solution

Inizia con Index.ts e ispeziona gli import da ./MultiSelect e react-select/src/Select, quindi esegui la build TypeScript o il controllo dei tipi del progetto. Conferma quale modulo ed esportazioni sono disponibili nelle dipendenze installate; il lavoro è completato quando il controllo viene compilato senza gli errori segnalati di modulo non dichiarato e nome mancante.