diff --git a/packages/demobank-ui/src/components/ErrorLoading.tsx b/packages/demobank-ui/src/components/ErrorLoading.tsx
index a4faa4d5d..f83b61234 100644
--- a/packages/demobank-ui/src/components/ErrorLoading.tsx
+++ b/packages/demobank-ui/src/components/ErrorLoading.tsx
@@ -32,6 +32,9 @@ export function ErrorLoading({ error }: { error: HttpError<SandboxBackend.Sandbo
           <p class="text-sm font-medium text-red-800">{error.message}</p>
         </div>
       </div>
+        <div class="ml-3 flex-1 md:flex md:justify-between">
+          <p class="text-sm font-medium text-red-800">Got status "{error.info.status}" on {error.info.url}</p>
+        </div>
     </div>
     </div>
   );
diff --git a/packages/demobank-ui/src/components/Transactions/state.ts b/packages/demobank-ui/src/components/Transactions/state.ts
index 30c48aa45..4b62b005e 100644
--- a/packages/demobank-ui/src/components/Transactions/state.ts
+++ b/packages/demobank-ui/src/components/Transactions/state.ts
@@ -44,7 +44,7 @@ export function useComponentState({ account }: Props): State {
         cp.targetType === "bitcoin" ? `${cp.targetPath.substring(0, 6)}...` : undefined) ??
         "unkown";
 
-      const when = AbsoluteTime.fromMilliseconds(tx.date / 1000);
+      const when = AbsoluteTime.fromProtocolTimestamp(tx.date);
       const amount = Amounts.parse(tx.amount);
       const subject = tx.subject;
       return {
diff --git a/packages/demobank-ui/src/components/app.tsx b/packages/demobank-ui/src/components/app.tsx
index ebda31035..a587c6f1e 100644
--- a/packages/demobank-ui/src/components/app.tsx
+++ b/packages/demobank-ui/src/components/app.tsx
@@ -29,6 +29,8 @@ import { useEffect, useState } from "preact/hooks";
 import { Loading } from "./Loading.js";
 import { getInitialBackendBaseURL } from "../hooks/backend.js";
 import { BANK_INTEGRATION_PROTOCOL_VERSION, useConfigState } from "../hooks/config.js";
+import { ErrorLoading } from "./ErrorLoading.js";
+import { BankFrame } from "../pages/BankFrame.js";
 const WITH_LOCAL_STORAGE_CACHE = false;
 
 /**
@@ -76,12 +78,18 @@ function VersionCheck({ children }: { children: ComponentChildren }): VNode {
   if (checked === undefined) {
     return <Loading />
   }
-  if (checked === false) {
-    return <div>
-      the bank backend is not supported. supported version "{BANK_INTEGRATION_PROTOCOL_VERSION}"
-    </div>
+  if (typeof checked ===  "string") {
+    return <BankFrame>
+      the bank backend is not supported. supported version "{BANK_INTEGRATION_PROTOCOL_VERSION}", server version "{checked}"
+    </BankFrame>
   }
-  return <Fragment>{children}</Fragment>
+  if (checked === true) {
+    return <Fragment>{children}</Fragment>
+  }
+  
+  return <BankFrame>
+    <ErrorLoading error={checked}/>
+  </BankFrame>
 }
 
 function localStorageProvider(): Map<unknown, unknown> {
diff --git a/packages/demobank-ui/src/declaration.d.ts b/packages/demobank-ui/src/declaration.d.ts
index 8d729c1f7..d3d9e02ef 100644
--- a/packages/demobank-ui/src/declaration.d.ts
+++ b/packages/demobank-ui/src/declaration.d.ts
@@ -205,8 +205,7 @@ namespace SandboxBackend {
       // Transaction unique ID.  Matches
       // $transaction_id from the URI.
       row_id: number;
-      date: number;
-      // date: Timestamp;
+      date: Timestamp;
     }
 
     interface CreateBankAccountTransactionCreate {
diff --git a/packages/demobank-ui/src/hooks/config.ts b/packages/demobank-ui/src/hooks/config.ts
index 4b22e8ad3..4cf677d35 100644
--- a/packages/demobank-ui/src/hooks/config.ts
+++ b/packages/demobank-ui/src/hooks/config.ts
@@ -1,5 +1,5 @@
 import { LibtoolVersion } from "@gnu-taler/taler-util";
-import { useApiContext } from "@gnu-taler/web-util/browser";
+import { ErrorType, HttpError, HttpResponseServerError, RequestError, useApiContext } from "@gnu-taler/web-util/browser";
 import { useEffect, useState } from "preact/hooks";
 import { getInitialBackendBaseURL } from "./backend.js";
 
@@ -12,38 +12,32 @@ export const BANK_INTEGRATION_PROTOCOL_VERSION = "0:0:0";
 
 async function getConfigState(
   request: ReturnType<typeof useApiContext>["request"],
-): Promise<SandboxBackend.Config | undefined> {
-  try {
-    const url = getInitialBackendBaseURL();
-    const result = await request<SandboxBackend.Config>(
-      url,
-      `config`,
-    );
-    return result.data;
-  } catch (error) {
-    return undefined;
-  }
+): Promise<SandboxBackend.Config> {
+  const url = getInitialBackendBaseURL();
+  const result = await request<SandboxBackend.Config>(url, `config`);
+  return result.data;
 }
 
-export function useConfigState(): boolean | undefined {
-  const [checked, setChecked] = useState<boolean>()
+export function useConfigState(): undefined | true | string | HttpError<SandboxBackend.SandboxError> {
+  const [checked, setChecked] = useState<true | string | HttpError<SandboxBackend.SandboxError>>()
   const { request } = useApiContext();
 
   useEffect(() => {
-    
     getConfigState(request)
-      .then((result) => {
-        if (!result) {
-          setChecked(false)
+      .then((s) => {
+        const r = LibtoolVersion.compare(BANK_INTEGRATION_PROTOCOL_VERSION, s.version)
+        if (r?.compatible) {
+          setChecked(true);
         } else {
-          const r = LibtoolVersion.compare(BANK_INTEGRATION_PROTOCOL_VERSION, result.version)
-          setChecked(r?.compatible);
+          setChecked(s.version)
         }
       })
-      .catch((error) => {
-        setChecked(false);
+      .catch((error: unknown) => {
+        if (error instanceof RequestError) {
+          setChecked(error.cause);
+        }
       });
-  });
+  }, []);
 
   return checked;
 }
diff --git a/packages/demobank-ui/src/pages/AccountPage/state.ts b/packages/demobank-ui/src/pages/AccountPage/state.ts
index c212e7484..ca7e1d447 100644
--- a/packages/demobank-ui/src/pages/AccountPage/state.ts
+++ b/packages/demobank-ui/src/pages/AccountPage/state.ts
@@ -75,9 +75,7 @@ export function useComponentState({ account, goToBusinessAccount, goToConfirmOpe
     };
   }
 
-  // FIXME: balance
-  const balanceIsDebit = true;
-  // data.balance.credit_debit_indicator == "debit";
+  const balanceIsDebit = data.balance.credit_debit_indicator == "debit";
   const limit = balanceIsDebit
     ? Amounts.sub(debitThreshold, balance).amount
     : Amounts.add(balance, debitThreshold).amount;
diff --git a/packages/demobank-ui/src/pages/BankFrame.tsx b/packages/demobank-ui/src/pages/BankFrame.tsx
index c4f872679..5c43d2c3e 100644
--- a/packages/demobank-ui/src/pages/BankFrame.tsx
+++ b/packages/demobank-ui/src/pages/BankFrame.tsx
@@ -15,7 +15,7 @@
  */
 
 import { Amounts, Logger, PaytoUriIBAN, TranslatedString, parsePaytoUri, stringifyPaytoUri } from "@gnu-taler/taler-util";
-import { notifyError, useNotifications, useTranslationContext } from "@gnu-taler/web-util/browser";
+import { notifyError, notifyException, useNotifications, useTranslationContext } from "@gnu-taler/web-util/browser";
 import { ComponentChildren, Fragment, h, VNode } from "preact";
 import { StateUpdater, useEffect, useErrorBoundary, useState } from "preact/hooks";
 import { LangSelectorLikePy as LangSelector } from "../components/LangSelector.js";
@@ -54,7 +54,12 @@ export function BankFrame({
 
   useEffect(() => {
     if (error) {
-      notifyError(i18n.str`Internal error, please report.`, (error instanceof Error ? error.message : String(error)) as TranslatedString)
+      const desc = (error instanceof Error ? error.stack : String(error)) as TranslatedString
+      if (error instanceof Error) {
+        notifyException(i18n.str`Internal error, please report.`, error)
+      } else {
+        notifyError(i18n.str`Internal error, please report.`, String(error) as TranslatedString)
+      }
       resetError()
     }
   }, [error])
@@ -386,6 +391,11 @@ function StatusBanner(): VNode {
                   {n.message.description}
                 </div>
               }
+              {n.message.debug &&
+                <div class="mt-2 text-sm text-red-700 font-mono break-all">
+                    {n.message.debug}
+                </div>
+              }
             </div>
           case "info":
             return <div class="rounded-md bg-green-50 border-4 border-green-600 p-6">
diff --git a/packages/demobank-ui/src/pages/WithdrawalQRCode.tsx b/packages/demobank-ui/src/pages/WithdrawalQRCode.tsx
index 25c571e28..8f4e175f6 100644
--- a/packages/demobank-ui/src/pages/WithdrawalQRCode.tsx
+++ b/packages/demobank-ui/src/pages/WithdrawalQRCode.tsx
@@ -45,7 +45,6 @@ export function WithdrawalQRCode({
   withdrawUri,
   onClose,
 }: Props): VNode {
-  const [settings, updateSettings] = useSettings();
   const { i18n } = useTranslationContext();
   const result = useWithdrawalDetails(withdrawUri.withdrawalOperationId);
 
diff --git a/packages/web-util/src/hooks/index.ts b/packages/web-util/src/hooks/index.ts
index c29de9023..cc3267dbd 100644
--- a/packages/web-util/src/hooks/index.ts
+++ b/packages/web-util/src/hooks/index.ts
@@ -4,6 +4,7 @@ export { useMemoryStorage } from "./useMemoryStorage.js";
 export {
   useNotifications,
   notifyError,
+  notifyException,
   notifyInfo,
   notify,
   ErrorNotification,
diff --git a/packages/web-util/src/hooks/useNotifications.ts b/packages/web-util/src/hooks/useNotifications.ts
index 2f9df24f9..792095b06 100644
--- a/packages/web-util/src/hooks/useNotifications.ts
+++ b/packages/web-util/src/hooks/useNotifications.ts
@@ -36,6 +36,17 @@ export function notifyError(
     debug,
   });
 }
+export function notifyException(
+  title: TranslatedString,
+  ex: Error,
+) {
+  notify({
+    type: "error" as const,
+    title,
+    description: ex.message as TranslatedString,
+    debug: ex.stack,
+  });
+}
 export function notifyInfo(title: TranslatedString) {
   notify({
     type: "info" as const,