diff --git a/packages/backend/src/server/web/boot.js b/packages/backend/src/server/web/boot.js
index e82de8e14d..9fc536555a 100644
--- a/packages/backend/src/server/web/boot.js
+++ b/packages/backend/src/server/web/boot.js
@@ -106,39 +106,15 @@
 	function renderError(code, details) {
 		let errorsElement = document.getElementById('errors');
 		if (!errorsElement) {
-			document.getElementsByTagName("head")[0].insertAdjacentHTML(
-				"beforeend",
-				`<link rel="stylesheet" href="../error.css" />`);
 			document.documentElement.innerHTML = `
-			<svg class="icon-warning" xmlns="http://www.w3.org/2000/svg" class="icon icon-tabler icon-tabler-alert-triangle" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round">
-   			<path stroke="none" d="M0 0h24v24H0z" fill="none"></path>
-   			<path d="M12 9v2m0 4v.01"></path>
-   			<path d="M5 19h14a2 2 0 0 0 1.84 -2.75l-7.1 -12.25a2 2 0 0 0 -3.5 0l-7.1 12.25a2 2 0 0 0 1.75 2.75"></path>
-			</svg>
-			<h1>An error has occurred!</h1>
-			<button class="button-big" onclick="location.reload(true);">
-				<span class="button-label-big">Refresh</span>
-			</button>
-      <p class="dont-worry">Don't worry, it's (probably) not your fault.</p>
-			<p>If the problem persists after refreshing, please contact your instance's administrator.<br>You may also try the following options:</p>
-      <a href="/flush">
-      <button class="button-small">
-        <span class="button-label-small">Flush preferences and cache</span>
-      </button>
-      </a>
-			<br>
-      <a href="/cli">
-        <button class="button-small">
-          <span class="button-label-small">Start the simple client</span>
-        </button>
-      </a>
-			<br>
-      <a href="/bios">
-        <button class="button-small">
-          <span class="button-label-small">Attempt to repair in Repair Tool</span>
-        </button>
-      </a>
-			<br>
+			<h1>⚠ An error has occurred. ⚠</h1>
+			<p>If the problem persists, please contact the administrator. You may also try the following options:</p>
+			<ul>
+				<li>Start <a href="/cli">the simple client</a></li>
+				<li>Attempt to repair in <a href="/bios">BIOS</a></li>
+				<li><a href="/flush">Flush preferences and cache</a></li>
+			</ul>
+			<hr>
 			<div id="errors"></div>
 			`;
 
@@ -146,7 +122,8 @@
 		}
 
 		const detailsElement = document.createElement('details');
-		detailsElement.innerHTML = `<br><summary><code>ERROR CODE: ${code}</code></summary>${JSON.stringify(details)}`;
+		detailsElement.innerHTML = `<summary><code>ERROR CODE: ${code}</code></summary>${JSON.stringify(details)}`;
+
 		errorsElement.appendChild(detailsElement);
 	}
 
diff --git a/packages/backend/src/server/web/error.css b/packages/backend/src/server/web/error.css
deleted file mode 100644
index 9f8f905017..0000000000
--- a/packages/backend/src/server/web/error.css
+++ /dev/null
@@ -1,98 +0,0 @@
-* {
-	font-family: BIZ UDGothic, Roboto, HelveticaNeue, Arial, sans-serif;
-}
-
-body,
-html {
-	background-color: #222;
-	color: #dfddcc;
-	justify-content: center;
-	margin: auto;
-	width: 80%;
-	padding: 10px;
-	text-align: center;
-}
-
-button {
-	border-radius: 999px;
-	padding: 0px 12px 0px 12px;
-	border: none;
-	cursor: pointer;
-	margin-bottom: 12px;
-}
-
-.button-big {
-	background: linear-gradient(90deg, rgb(134, 179, 0), rgb(74, 179, 0));
-	line-height: 50px;
-}
-
-.button-big:hover {
-	background: rgb(153, 204, 0);
-}
-
-.button-small {
-	background: #444;
-	line-height: 40px;
-}
-
-.button-small:hover {
-	background: #555;
-}
-
-.button-label-big {
-	color: #222;
-	font-weight: bold;
-	font-size: 20px;
-	padding: 12px;
-}
-
-.button-label-small {
-	color: rgb(153, 204, 0);
-	font-size: 16px;
-	padding: 12px;
-}
-
-a {
-	color: rgb(134, 179, 0);
-	text-decoration: none;
-}
-
-p,
-li {
-	font-size: 16px;
-}
-
-.dont-worry,
-#msg {
-	font-size: 18px;
-}
-
-.icon-warning {
-	color: #dec340;
-	height: 4rem;
-}
-
-h1 {
-	font-size: 32px;
-}
-
-code {
-	font-family: Fira, FiraCode, monospace;
-}
-
-details {
-	background: #333;
-	margin-bottom: 2rem;
-	padding: 0.5rem 1rem;
-	border-radius: 5px;
-	justify-content: center;
-	margin: auto;
-}
-
-summary {
-	cursor: pointer;
-}
-
-summary > * {
-	display: inline;
-}
diff --git a/packages/backend/src/server/web/views/base.pug b/packages/backend/src/server/web/views/base.pug
index 32499aa452..5bb156f0f4 100644
--- a/packages/backend/src/server/web/views/base.pug
+++ b/packages/backend/src/server/web/views/base.pug
@@ -53,7 +53,7 @@ html
 		block meta
 
 		block og
-			meta(property='og:title'       content= title || 'Misskey')
+			meta(property='og:title'       content= title || 'Misskey') 
 			meta(property='og:description' content= desc || '✨🌎✨ A interplanetary communication platform ✨🚀✨') 
 			meta(property='og:image'       content= img)
 
diff --git a/packages/backend/src/server/web/views/flush.pug b/packages/backend/src/server/web/views/flush.pug
index b08f61c73a..ec585a34db 100644
--- a/packages/backend/src/server/web/views/flush.pug
+++ b/packages/backend/src/server/web/views/flush.pug
@@ -1,12 +1,6 @@
 doctype html
 
 html
-	head
-		meta(charset='utf-8')
-		meta(name='application-name' content='Misskey')
-		title Flushing Misskey
-		style
-			include ../error.css
 	#msg
 	script.
 		const msg = document.getElementById('msg');