Show proper error message when Candle analysis fails

closes #1387

src/stores/ftbot.ts

@@ -362,30 +362,37 @@ export function createBotSubStore(botId: string, botName: string) {
           reject(error);
         });
       },
-      getPairHistory(payload: PairHistoryPayload) {
+      async getPairHistory(payload: PairHistoryPayload) {
         if (payload.pair && payload.timeframe) {
           this.historyStatus = LoadingStatus.loading;
-          return api
-            .get('/pair_history', {
+          try {
+            const { data } = await api.get('/pair_history', {
               params: { ...payload },
               timeout: 50000,
-            })
-            .then((result) => {
+            });
             this.history = {
               [`${payload.pair}__${payload.timeframe}`]: {
                 pair: payload.pair,
                 timeframe: payload.timeframe,
                 timerange: payload.timerange,
-                  data: result.data,
+                data: data,
               },
             };
             this.historyStatus = LoadingStatus.success;
-            })
-            .catch((err) => {
+          } catch (err) {
             console.error(err);
             this.historyStatus = LoadingStatus.error;
+            if (axios.isAxiosError(err)) {
+              console.error(err.response);
+              const errMsg = err.response?.data?.detail ?? 'Error fetching history';
+              showAlert(errMsg, 'danger');
+            }
+
+            return new Promise((resolve, reject) => {
+              reject(err);
             });
           }
+        }
         // Error branchs
         const error = 'pair or timeframe or timerange not specified';
         console.error(error);