Rocket.Chat/app/cloud/client/admin/callback.html

<template name="cloudCallback">
	<div class="main-content-flex">
		<section class="page-container page-home page-static page-settings">
			{{> header sectionName="Cloud_connect"}}
			<div class="content">
				{{#requiresPermission 'manage-cloud'}}
					{{#if callbackError.error}}
						<p>{{_ "Cloud_error_in_authenticating"}}</p>

						<p>{{_ "Cloud_error_code"}} {{ callbackError.errorCode }}</p>
					{{/if}}
				{{/requiresPermission}}
			</div>
		</section>
	</div>
</template>