PLT-7025: Fix Slack Import API. (#6905)

webapp/utils/utils.jsx

@@ -1107,7 +1107,7 @@ export function isDirectChannelForUser(otherUserId, channel) {
 }
 
 export function importSlack(file, success, error) {
-    Client4.importTeam(file, 'slack').then(success).catch(error);
+    Client4.importTeam(TeamStore.getCurrent().id, file, 'slack').then(success).catch(error);
 }
 
 export function windowWidth() {