diff --git a/src/web/app/common/-tags/error.tag b/src/web/app/common/-tags/error.tag
deleted file mode 100644
index f09c0ce955..0000000000
--- a/src/web/app/common/-tags/error.tag
+++ /dev/null
@@ -1,215 +0,0 @@
-<mk-error>
-	<img src="data:image/jpeg;base64,%base64:/assets/error.jpg%" alt=""/>
-	<h1>%i18n:common.tags.mk-error.title%</h1>
-	<p class="text">{
-		'%i18n:common.tags.mk-error.description%'.substr(0, '%i18n:common.tags.mk-error.description%'.indexOf('{'))
-	}<a @click="reload">{
-		'%i18n:common.tags.mk-error.description%'.match(/\{(.+?)\}/)[1]
-	}</a>{
-		'%i18n:common.tags.mk-error.description%'.substr('%i18n:common.tags.mk-error.description%'.indexOf('}') + 1)
-	}</p>
-	<button v-if="!troubleshooting" @click="troubleshoot">%i18n:common.tags.mk-error.troubleshoot%</button>
-	<mk-troubleshooter v-if="troubleshooting"/>
-	<p class="thanks">%i18n:common.tags.mk-error.thanks%</p>
-	<style lang="stylus" scoped>
-		:scope
-			display block
-			width 100%
-			padding 32px 18px
-			text-align center
-
-			> img
-				display block
-				height 200px
-				margin 0 auto
-				pointer-events none
-				user-select none
-
-			> h1
-				display block
-				margin 1.25em auto 0.65em auto
-				font-size 1.5em
-				color #555
-
-			> .text
-				display block
-				margin 0 auto
-				max-width 600px
-				font-size 1em
-				color #666
-
-			> button
-				display block
-				margin 1em auto 0 auto
-				padding 8px 10px
-				color $theme-color-foreground
-				background $theme-color
-
-				&:focus
-					outline solid 3px rgba($theme-color, 0.3)
-
-				&:hover
-					background lighten($theme-color, 10%)
-
-				&:active
-					background darken($theme-color, 10%)
-
-			> mk-troubleshooter
-				margin 1em auto 0 auto
-
-			> .thanks
-				display block
-				margin 2em auto 0 auto
-				padding 2em 0 0 0
-				max-width 600px
-				font-size 0.9em
-				font-style oblique
-				color #aaa
-				border-top solid 1px #eee
-
-			@media (max-width 500px)
-				padding 24px 18px
-				font-size 80%
-
-				> img
-					height 150px
-
-	</style>
-	<script lang="typescript">
-		this.troubleshooting = false;
-
-		this.on('mount', () => {
-			document.title = 'Oops!';
-			document.documentElement.style.background = '#f8f8f8';
-		});
-
-		this.reload = () => {
-			location.reload();
-		};
-
-		this.troubleshoot = () => {
-			this.update({
-				troubleshooting: true
-			});
-		};
-	</script>
-</mk-error>
-
-<mk-troubleshooter>
-	<h1>%fa:wrench%%i18n:common.tags.mk-error.troubleshooter.title%</h1>
-	<div>
-		<p data-wip={ network == null }><template v-if="network != null"><template v-if="network">%fa:check%</template><template v-if="!network">%fa:times%</template></template>{ network == null ? '%i18n:common.tags.mk-error.troubleshooter.checking-network%' : '%i18n:common.tags.mk-error.troubleshooter.network%' }<mk-ellipsis v-if="network == null"/></p>
-		<p v-if="network == true" data-wip={ internet == null }><template v-if="internet != null"><template v-if="internet">%fa:check%</template><template v-if="!internet">%fa:times%</template></template>{ internet == null ? '%i18n:common.tags.mk-error.troubleshooter.checking-internet%' : '%i18n:common.tags.mk-error.troubleshooter.internet%' }<mk-ellipsis v-if="internet == null"/></p>
-		<p v-if="internet == true" data-wip={ server == null }><template v-if="server != null"><template v-if="server">%fa:check%</template><template v-if="!server">%fa:times%</template></template>{ server == null ? '%i18n:common.tags.mk-error.troubleshooter.checking-server%' : '%i18n:common.tags.mk-error.troubleshooter.server%' }<mk-ellipsis v-if="server == null"/></p>
-	</div>
-	<p v-if="!end">%i18n:common.tags.mk-error.troubleshooter.finding%<mk-ellipsis/></p>
-	<p v-if="network === false"><b>%fa:exclamation-triangle%%i18n:common.tags.mk-error.troubleshooter.no-network%</b><br>%i18n:common.tags.mk-error.troubleshooter.no-network-desc%</p>
-	<p v-if="internet === false"><b>%fa:exclamation-triangle%%i18n:common.tags.mk-error.troubleshooter.no-internet%</b><br>%i18n:common.tags.mk-error.troubleshooter.no-internet-desc%</p>
-	<p v-if="server === false"><b>%fa:exclamation-triangle%%i18n:common.tags.mk-error.troubleshooter.no-server%</b><br>%i18n:common.tags.mk-error.troubleshooter.no-server-desc%</p>
-	<p v-if="server === true" class="success"><b>%fa:info-circle%%i18n:common.tags.mk-error.troubleshooter.success%</b><br>%i18n:common.tags.mk-error.troubleshooter.success-desc%</p>
-
-	<style lang="stylus" scoped>
-		:scope
-			display block
-			width 100%
-			max-width 500px
-			text-align left
-			background #fff
-			border-radius 8px
-			border solid 1px #ddd
-
-			> h1
-				margin 0
-				padding 0.6em 1.2em
-				font-size 1em
-				color #444
-				border-bottom solid 1px #eee
-
-				> [data-fa]
-					margin-right 0.25em
-
-			> div
-				overflow hidden
-				padding 0.6em 1.2em
-
-				> p
-					margin 0.5em 0
-					font-size 0.9em
-					color #444
-
-					&[data-wip]
-						color #888
-
-					> [data-fa]
-						margin-right 0.25em
-
-						&.times
-							color #e03524
-
-						&.check
-							color #84c32f
-
-			> p
-				margin 0
-				padding 0.6em 1.2em
-				font-size 1em
-				color #444
-				border-top solid 1px #eee
-
-				> b
-					> [data-fa]
-						margin-right 0.25em
-
-				&.success
-					> b
-						color #39adad
-
-				&:not(.success)
-					> b
-						color #ad4339
-
-	</style>
-	<script lang="typescript">
-		this.on('mount', () => {
-			this.update({
-				network: navigator.onLine
-			});
-
-			if (!this.network) {
-				this.update({
-					end: true
-				});
-				return;
-			}
-
-			// Check internet connection
-			fetch('https://google.com?rand=' + Math.random(), {
-				mode: 'no-cors'
-			}).then(() => {
-				this.update({
-					internet: true
-				});
-
-				// Check misskey server is available
-				fetch(`${_API_URL_}/meta`).then(() => {
-					this.update({
-						end: true,
-						server: true
-					});
-				})
-				.catch(() => {
-					this.update({
-						end: true,
-						server: false
-					});
-				});
-			})
-			.catch(() => {
-				this.update({
-					end: true,
-					internet: false
-				});
-			});
-		});
-	</script>
-</mk-troubleshooter>
diff --git a/src/web/app/common/views/components/connect-failed.troubleshooter.vue b/src/web/app/common/views/components/connect-failed.troubleshooter.vue
new file mode 100644
index 0000000000..49396d1584
--- /dev/null
+++ b/src/web/app/common/views/components/connect-failed.troubleshooter.vue
@@ -0,0 +1,137 @@
+<template>
+<div class="troubleshooter">
+	<h1>%fa:wrench%%i18n:common.tags.mk-error.troubleshooter.title%</h1>
+	<div>
+		<p :data-wip="network == null">
+			<template v-if="network != null">
+				<template v-if="network">%fa:check%</template>
+				<template v-if="!network">%fa:times%</template>
+			</template>
+			{{ network == null ? '%i18n:common.tags.mk-error.troubleshooter.checking-network%' : '%i18n:common.tags.mk-error.troubleshooter.network%' }}<mk-ellipsis v-if="network == null"/>
+		</p>
+		<p v-if="network == true" :data-wip="internet == null">
+			<template v-if="internet != null">
+				<template v-if="internet">%fa:check%</template>
+				<template v-if="!internet">%fa:times%</template>
+			</template>
+			{{ internet == null ? '%i18n:common.tags.mk-error.troubleshooter.checking-internet%' : '%i18n:common.tags.mk-error.troubleshooter.internet%' }}<mk-ellipsis v-if="internet == null"/>
+		</p>
+		<p v-if="internet == true" :data-wip="server == null">
+			<template v-if="server != null">
+				<template v-if="server">%fa:check%</template>
+				<template v-if="!server">%fa:times%</template>
+			</template>
+			{{ server == null ? '%i18n:common.tags.mk-error.troubleshooter.checking-server%' : '%i18n:common.tags.mk-error.troubleshooter.server%' }}<mk-ellipsis v-if="server == null"/>
+		</p>
+	</div>
+	<p v-if="!end">%i18n:common.tags.mk-error.troubleshooter.finding%<mk-ellipsis/></p>
+	<p v-if="network === false"><b>%fa:exclamation-triangle%%i18n:common.tags.mk-error.troubleshooter.no-network%</b><br>%i18n:common.tags.mk-error.troubleshooter.no-network-desc%</p>
+	<p v-if="internet === false"><b>%fa:exclamation-triangle%%i18n:common.tags.mk-error.troubleshooter.no-internet%</b><br>%i18n:common.tags.mk-error.troubleshooter.no-internet-desc%</p>
+	<p v-if="server === false"><b>%fa:exclamation-triangle%%i18n:common.tags.mk-error.troubleshooter.no-server%</b><br>%i18n:common.tags.mk-error.troubleshooter.no-server-desc%</p>
+	<p v-if="server === true" class="success"><b>%fa:info-circle%%i18n:common.tags.mk-error.troubleshooter.success%</b><br>%i18n:common.tags.mk-error.troubleshooter.success-desc%</p>
+</div>
+</template>
+
+<script lang="ts">
+import Vue from 'vue';
+import { apiUrl } from '../../../config';
+
+export default Vue.extend({
+	data() {
+		return {
+			network: navigator.onLine,
+			end: false,
+			internet: false,
+			server: false
+		};
+	},
+	mounted() {
+		if (!this.network) {
+			this.end = true;
+			return;
+		}
+
+		// Check internet connection
+		fetch('https://google.com?rand=' + Math.random(), {
+			mode: 'no-cors'
+		}).then(() => {
+			this.internet = true;
+
+			// Check misskey server is available
+			fetch(`${apiUrl}/meta`).then(() => {
+				this.end = true;
+				this.server = true;
+			})
+			.catch(() => {
+				this.end = true;
+				this.server = false;
+			});
+		})
+		.catch(() => {
+			this.end = true;
+			this.internet = false;
+		});
+	}
+});
+</script>
+
+<style lang="stylus" scoped>
+.troubleshooter
+	width 100%
+	max-width 500px
+	text-align left
+	background #fff
+	border-radius 8px
+	border solid 1px #ddd
+
+	> h1
+		margin 0
+		padding 0.6em 1.2em
+		font-size 1em
+		color #444
+		border-bottom solid 1px #eee
+
+		> [data-fa]
+			margin-right 0.25em
+
+	> div
+		overflow hidden
+		padding 0.6em 1.2em
+
+		> p
+			margin 0.5em 0
+			font-size 0.9em
+			color #444
+
+			&[data-wip]
+				color #888
+
+			> [data-fa]
+				margin-right 0.25em
+
+				&.times
+					color #e03524
+
+				&.check
+					color #84c32f
+
+	> p
+		margin 0
+		padding 0.6em 1.2em
+		font-size 1em
+		color #444
+		border-top solid 1px #eee
+
+		> b
+			> [data-fa]
+				margin-right 0.25em
+
+		&.success
+			> b
+				color #39adad
+
+		&:not(.success)
+			> b
+				color #ad4339
+
+</style>
diff --git a/src/web/app/common/views/components/connect-failed.vue b/src/web/app/common/views/components/connect-failed.vue
new file mode 100644
index 0000000000..4761c6d6e0
--- /dev/null
+++ b/src/web/app/common/views/components/connect-failed.vue
@@ -0,0 +1,99 @@
+<template>
+<div class="mk-connect-failed">
+	<img src="data:image/jpeg;base64,%base64:/assets/error.jpg%" alt=""/>
+	<h1>%i18n:common.tags.mk-error.title%</h1>
+	<p class="text">
+		{{ '%i18n:common.tags.mk-error.description%'.substr(0, '%i18n:common.tags.mk-error.description%'.indexOf('{')) }}
+		<a @click="location.reload()">{{ '%i18n:common.tags.mk-error.description%'.match(/\{(.+?)\}/)[1] }}</a>
+		{{ '%i18n:common.tags.mk-error.description%'.substr('%i18n:common.tags.mk-error.description%'.indexOf('}') + 1) }}
+	</p>
+	<button v-if="!troubleshooting" @click="troubleshooting = true">%i18n:common.tags.mk-error.troubleshoot%</button>
+	<x-troubleshooter v-if="troubleshooting"/>
+	<p class="thanks">%i18n:common.tags.mk-error.thanks%</p>
+</div>
+</template>
+
+<script lang="ts">
+import Vue from 'vue';
+import XTroubleshooter from './connect-failed.troubleshooter.vue';
+
+export default Vue.extend({
+	components: {
+		XTroubleshooter
+	},
+	data() {
+		return {
+			troubleshooting: false
+		};
+	},
+	mounted() {
+		document.title = 'Oops!';
+		document.documentElement.style.background = '#f8f8f8';
+	}
+});
+</script>
+
+<style lang="stylus" scoped>
+.mk-connect-failed
+	width 100%
+	padding 32px 18px
+	text-align center
+
+	> img
+		display block
+		height 200px
+		margin 0 auto
+		pointer-events none
+		user-select none
+
+	> h1
+		display block
+		margin 1.25em auto 0.65em auto
+		font-size 1.5em
+		color #555
+
+	> .text
+		display block
+		margin 0 auto
+		max-width 600px
+		font-size 1em
+		color #666
+
+	> button
+		display block
+		margin 1em auto 0 auto
+		padding 8px 10px
+		color $theme-color-foreground
+		background $theme-color
+
+		&:focus
+			outline solid 3px rgba($theme-color, 0.3)
+
+		&:hover
+			background lighten($theme-color, 10%)
+
+		&:active
+			background darken($theme-color, 10%)
+
+	> .troubleshooter
+		margin 1em auto 0 auto
+
+	> .thanks
+		display block
+		margin 2em auto 0 auto
+		padding 2em 0 0 0
+		max-width 600px
+		font-size 0.9em
+		font-style oblique
+		color #aaa
+		border-top solid 1px #eee
+
+	@media (max-width 500px)
+		padding 24px 18px
+		font-size 80%
+
+		> img
+			height 150px
+
+</style>
+