diff --git a/src/vs/workbench/contrib/webview/browser/webviewEditorInput.ts b/src/vs/workbench/contrib/webview/browser/webviewEditorInput.ts
index 5efb65da40fc3fb8b7c919f6e0176c8194a36800..1a6bee73161b1f242a9f4f62f649233402e53bf6 100644
--- a/src/vs/workbench/contrib/webview/browser/webviewEditorInput.ts
+++ b/src/vs/workbench/contrib/webview/browser/webviewEditorInput.ts
@@ -42,17 +42,22 @@ class WebviewIconsManager {
 
 	private async updateStyleSheet(lifecycleService: ILifecycleService, ) {
 		await lifecycleService.when(LifecyclePhase.Starting);
-		const cssRules: string[] = [];
-		this._icons.forEach((value, key) => {
-			const webviewSelector = `.show-file-icons .webview-${key}-name-file-icon::before`;
-			if (URI.isUri(value)) {
-				cssRules.push(`${webviewSelector} { content: ""; background-image: ${dom.asCSSUrl(value)}; }`);
-			} else {
-				cssRules.push(`.vs ${webviewSelector} { content: ""; background-image: ${dom.asCSSUrl(value.light)}; }`);
-				cssRules.push(`.vs-dark ${webviewSelector} { content: ""; background-image: ${dom.asCSSUrl(value.dark)}; }`);
-			}
-		});
-		this._styleElement.innerHTML = cssRules.join('\n');
+
+		try {
+			const cssRules: string[] = [];
+			this._icons.forEach((value, key) => {
+				const webviewSelector = `.show-file-icons .webview-${key}-name-file-icon::before`;
+				if (URI.isUri(value)) {
+					cssRules.push(`${webviewSelector} { content: ""; background-image: ${dom.asCSSUrl(value)}; }`);
+				} else {
+					cssRules.push(`.vs ${webviewSelector} { content: ""; background-image: ${dom.asCSSUrl(value.light)}; }`);
+					cssRules.push(`.vs-dark ${webviewSelector} { content: ""; background-image: ${dom.asCSSUrl(value.dark)}; }`);
+				}
+			});
+			this._styleElement.innerHTML = cssRules.join('\n');
+		} catch {
+			// noop
+		}
 	}
 }