Fix Engagement Dashboard API requests (#24142)

ee/client/lib/getFromRestApi.ts

@@ -14,7 +14,7 @@ export const getFromRestApi =
 			? void
 			: Serialized<OperationParams<'GET', MatchPathPattern<TPath>>>,
 	): Promise<Serialized<OperationResult<'GET', MatchPathPattern<TPath>>>> => {
-		const response = await APIClient.get(endpoint, params);
+		const response = await APIClient.get(endpoint.replace(/^\/+/, ''), params);
 
 		if (typeof response === 'string') {
 			throw new Error('invalid response data type');