fix: fix unhandled promise rejection error thrown from sidekick

Author: Fatme

lib/services/livesync/playground/preview-app-livesync-service.ts

@@ -26,20 +26,25 @@ export class PreviewAppLiveSyncService extends EventEmitter implements IPreviewA
 
 	public async initialize(data: IPreviewAppLiveSyncData): Promise<void> {
 		await this.$previewSdkService.initialize(async (device: Device) => {
-			if (!device) {
-				this.$errors.failWithoutHelp("Sending initial preview files without a specified device is not supported.");
-			}
+			try {
+				if (!device) {
+					this.$errors.failWithoutHelp("Sending initial preview files without a specified device is not supported.");
+				}
 
-			if (this.deviceInitializationPromise[device.id]) {
-				return this.deviceInitializationPromise[device.id];
-			}
+				if (this.deviceInitializationPromise[device.id]) {
+					return this.deviceInitializationPromise[device.id];
+				}
 
-			this.deviceInitializationPromise[device.id] = this.getInitialFilesForDevice(data, device);
-			try {
-				const payloads = await this.deviceInitializationPromise[device.id];
-				return payloads;
-			} finally {
-				this.deviceInitializationPromise[device.id] = null;
+				this.deviceInitializationPromise[device.id] = this.getInitialFilesForDevice(data, device);
+				try {
+					const payloads = await this.deviceInitializationPromise[device.id];
+					return payloads;
+				} finally {
+					this.deviceInitializationPromise[device.id] = null;
+				}
+			} catch (err) {
+				this.$logger.error(err);
+				this.emit(PreviewAppLiveSyncEvents.PREVIEW_APP_LIVE_SYNC_ERROR, err);
 			}
 		});
 	}