diff --git a/src/components/account/AssetOverview.tsx b/src/components/account/AssetOverview.tsx
index 7021dd8b..23e53419 100644
--- a/src/components/account/AssetOverview.tsx
+++ b/src/components/account/AssetOverview.tsx
@@ -57,7 +57,7 @@ export function AssetOverview({ asset, refresh }: AssetOverviewProps) {
         }}
         onFail={() => setIsVisible(false)}
         onCancel={() => setIsVisible(false)}
-        initialValues={{ from: account, to: accounts[0].address, amount: 0 }}
+        initialValues={{ from: account, to: accounts[0]?.address, amount: 0 }}
         extrinsic={(values) => {
           const { to, amount } = values;
           const moduleName = isRing(asset.token?.symbol) ? 'balances' : 'kton';
diff --git a/src/components/toolbox/withdraw.tsx b/src/components/toolbox/withdraw.tsx
index 6c267ef8..73021d52 100644
--- a/src/components/toolbox/withdraw.tsx
+++ b/src/components/toolbox/withdraw.tsx
@@ -79,7 +79,7 @@ export function Withdraw() {
 
           if (status === 'success' && accountHex !== EMPTY_ADDRESS) {
             getSendTransactionObs({
-              from: accounts[0].address,
+              from: accounts[0]?.address,
               to: DVM_WITHDRAW_ADDRESS,
               data: accountHex,
               value: web3.utils.toWei(amount, 'ether'),
diff --git a/src/utils/network/connection.tsx b/src/utils/network/connection.tsx
index 8a6fd3b9..cc47ae21 100644
--- a/src/utils/network/connection.tsx
+++ b/src/utils/network/connection.tsx
@@ -45,8 +45,8 @@ export const LOCAL = 'local';
 
 export const getPolkadotConnection: (network: ChainConfig) => Observable<PolkadotConnection> = (network) =>
   from(web3Enable('polkadot-js/apps')).pipe(
-    concatMap((extensions) =>
-      combineLatest([from(web3Accounts()), accountsObs.subject.asObservable()], (injected, data) => {
+    concatMap((extensions) => {
+      const result = combineLatest([from(web3Accounts()), accountsObs.subject.asObservable()], (injected, data) => {
         const keys = Object.keys(data);
         const injectedAddress = injected.map((item) => item.address);
         const source = keys.filter((key) => !injectedAddress.includes(key));
@@ -71,8 +71,15 @@ export const getPolkadotConnection: (network: ChainConfig) => Observable<Polkado
               status: 'pending',
             } as Exclude<PolkadotConnection, 'api'>)
         )
-      )
-    ),
+      );
+
+      if (!extensions.length) {
+        showWarning('Polkadot', 'https://polkadot.js.org/extension/');
+        return EMPTY;
+      }
+
+      return result;
+    }),
     switchMap((envelop: Exclude<PolkadotConnection, 'api'>) => {
       const subject = new BehaviorSubject<PolkadotConnection>(envelop);
       const url = network.provider.rpc;