some fixes

frontend/src/conversation/conversationApi.ts

@@ -46,7 +46,7 @@ export function fetchAnswerApi(
       if (response.ok) {
         return response.json();
       } else {
-        Promise.reject(response);
+        return Promise.reject(new Error(response.statusText));
       }
     })
     .then((data) => {

frontend/src/conversation/conversationSlice.ts

@@ -9,15 +9,16 @@ const initialState: ConversationState = {
   status: 'idle',
 };
 
-const API_STREAMING = import.meta.env.API_STREAMING || false;
+const API_STREAMING = import.meta.env.API_STREAMING || true;
 
 export const fetchAnswer = createAsyncThunk<
-  Answer | void,
+  Answer,
   { question: string },
   { dispatch: Dispatch<any>; state: RootState }
 >('fetchAnswer', async ({ question }, { dispatch, getState }) => {
   const state = getState();
 
+  if (state.preference) {
     if (API_STREAMING) {
       fetchAnswerSteaming(
         question,
@@ -49,11 +50,8 @@ export const fetchAnswer = createAsyncThunk<
         state.preference.selectedDocs!,
         state.conversation.queries,
       );
+      if (answer) {
         dispatch(
-      // conversationSlice.actions.addQuery({
-      //   question: question,
-      //   response: answer,
-      // }),
           updateQuery({
             index: state.conversation.queries.length - 1,
             query: { response: answer.answer },
@@ -61,6 +59,8 @@ export const fetchAnswer = createAsyncThunk<
         );
         dispatch(conversationSlice.actions.setStatus('idle'));
       }
+    }
+  }
 });
 
 export const conversationSlice = createSlice({