diff --git a/locales/en/translation.json b/locales/en/translation.json
index c27ab50f..0ac29dc0 100644
--- a/locales/en/translation.json
+++ b/locales/en/translation.json
@@ -27,7 +27,11 @@
       "authorize": "Authorize",
       "authorization_code": "Authorization Code",
       "authorization_helper": "Please paste the authorization code from your browser",
-      "without_code_authorize": "Please approve Whalebird in your browser, and after you approve it please authorize"
+      "without_code_authorize": "Please approve Whalebird in your browser, and after you approve it please authorize",
+      "detector_error": "Failed to connect to {domain}, make sure the server URL is valid or correct.",
+      "register_error": "Failed to add application.",
+      "token_error": "Failed to authorize.",
+      "credential_error": "Failed to confirm access token."
     },
     "remove": "Remove"
   },
diff --git a/renderer/components/accounts/New.tsx b/renderer/components/accounts/New.tsx
index 959ca17e..95738941 100644
--- a/renderer/components/accounts/New.tsx
+++ b/renderer/components/accounts/New.tsx
@@ -1,8 +1,8 @@
-import { Label, Modal, TextInput, Button } from 'flowbite-react'
+import { Label, Modal, TextInput, Button, Alert, Spinner } from 'flowbite-react'
 import generator, { MegalodonInterface, OAuth, detector } from 'megalodon'
 import { useState } from 'react'
 import { db } from '@/db'
-import { FormattedMessage } from 'react-intl'
+import { FormattedMessage, useIntl } from 'react-intl'
 
 type NewProps = {
   opened: boolean
@@ -14,29 +14,53 @@ export default function New(props: NewProps) {
   const [domain, setDomain] = useState<string>('')
   const [client, setClient] = useState<MegalodonInterface>()
   const [appData, setAppData] = useState<OAuth.AppData>()
+  const [error, setError] = useState("")
+  const [loading, setLoading] = useState(false)
+
+  const { formatMessage } = useIntl()
 
   const close = () => {
     setSNS(null)
     setDomain('')
     setClient(undefined)
     setAppData(undefined)
+    setError("")
+    setLoading(false)
     props.close()
   }
 
   const checkDomain = async () => {
+    setError("")
+    setLoading(true)
     const input = document.getElementById('domain') as HTMLInputElement
     setDomain(input.value)
     const url = `https://${input.value}`
-    const sns = await detector(url)
+    const sns = await detector(url).catch(() => {
+      setError(formatMessage({ id: 'accounts.new.detector_error' }, { domain: input.value}))
+      return undefined
+    })
+    if (!sns) {
+      setLoading(false)
+      return
+    }
     setSNS(sns)
     const client = generator(sns, url)
     setClient(client)
-    const appData = await client.registerApp('Whalebird', {})
+    const appData = await client.registerApp('Whalebird', {}).catch(() => {
+      setError(formatMessage({ id: "accounts.new.register_error" }))
+      return undefined
+    })
+    setLoading(false)
+    if (!appData) {
+      return
+    }
     setAppData(appData)
     global.ipc.invoke('open-browser', appData.url)
   }
 
   const authorize = async () => {
+    setError("")
+    setLoading(true)
     if (!client || !appData) return
     const input = document.getElementById('authorization') as HTMLInputElement
     let authorizationCode = null
@@ -45,10 +69,27 @@ export default function New(props: NewProps) {
     } else {
       authorizationCode = input.value
     }
-    const tokenData = await client.fetchAccessToken(appData.client_id, appData.client_secret, authorizationCode)
-    if (!sns) return
+    const tokenData = await client.fetchAccessToken(appData.client_id, appData.client_secret, authorizationCode).catch(() => {
+      setError(formatMessage({ id: "accounts.new.token_error" }))
+      return undefined
+    })
+    if (!tokenData) {
+      setLoading(false)
+      return
+    }
+    if (!sns) {
+      setLoading(false)
+      return
+      }
     const cli = generator(sns, `https://${domain}`, tokenData.access_token, 'Whalebird')
-    const acct = await cli.verifyAccountCredentials()
+    const acct = await cli.verifyAccountCredentials().catch(() => {
+      setError(formatMessage({ id: "accounts.new.credential_error" }))
+      return undefined
+    })
+    setLoading(false)
+    if (!acct) {
+      return
+    }
     await db.accounts.add({
       username: acct.data.username,
       account_id: acct.data.id,
@@ -71,8 +112,13 @@ export default function New(props: NewProps) {
           <FormattedMessage id="accounts.new.title" />
         </Modal.Header>
         <Modal.Body>
+          {error && (
+            <Alert color="failure">
+              <span>{error}</span>
+            </Alert>
+          )}
           <form className="flex max-w-md flex-col gap-2">
-            {sns === null && (
+            {sns === null ? (
               <>
                 <div className="block">
                   <Label htmlFor="domain">
@@ -80,37 +126,45 @@ export default function New(props: NewProps) {
                   </Label>
                 </div>
                 <TextInput id="domain" placeholder="mastodon.social" required type="text" />
-                <Button onClick={checkDomain}>
+                <Button onClick={checkDomain} disabled={loading}>
                   <FormattedMessage id="accounts.new.sign_in" />
                 </Button>
               </>
-            )}
-            {sns && appData && (
+            ) : (
               <>
-                {appData.session_token ? (
+                {appData ? (
                   <>
-                    <div className="block text-gray-600">
-                      <FormattedMessage id="accounts.new.without_code_authorize" />
-                    </div>
+                    {appData.session_token ? (
+                      <>
+                        <div className="block text-gray-600">
+                          <FormattedMessage id="accounts.new.without_code_authorize" />
+                        </div>
+                      </>
+                    ) : (
+                      <>
+                        <div className="block">
+                          <Label htmlFor="authorization">
+                            <FormattedMessage id="accounts.new.authorization_code" />
+                          </Label>
+                          <p className="text-sm text-gray-600">
+                            <FormattedMessage id="accounts.new.authorization_helper" />
+                          </p>
+                        </div>
+                        <TextInput id="authorization" required type="text" />
+                      </>
+                    )}
+
+                    <Button onClick={authorize} disabled={loading}>
+                      <FormattedMessage id="accounts.new.authorize" />
+                    </Button>
                   </>
                 ) : (
-                  <>
-                    <div className="block">
-                      <Label htmlFor="authorization">
-                        <FormattedMessage id="accounts.new.authorization_code" />
-                      </Label>
-                      <p className="text-sm text-gray-600">
-                        <FormattedMessage id="accounts.new.authorization_helper" />
-                      </p>
-                    </div>
-                    <TextInput id="authorization" required type="text" />
-                  </>
+                  <div className="text-center">
+                    <Spinner aria-label="Loading" />
+                  </div>
                 )}
-
-                <Button onClick={authorize}>
-                  <FormattedMessage id="accounts.new.authorize" />
-                </Button>
               </>
+
             )}
           </form>
         </Modal.Body>