woocommerce/plugins/woocommerce-blocks/assets/js/components/error-placeholder/editor.scss

.wc-block-error-message {
	margin-bottom: 16px;
	margin-top: 8px;
}

.wc-block-api-error {
	.components-placeholder__fieldset {
		display: block;
	}

	.wc-block-error-message {
		margin-top: 0;
	}

	.components-spinner {
		float: none;
	}
}