com/templates/user/auth/u2f_error.tmpl

<div class="ui small modal" id="u2f-error">
	<div class="header">{{.i18n.Tr "u2f_error"}}</div>
	<div class="content">
		<div class="ui negative message">
			<div class="header">
			{{.i18n.Tr "u2f_error"}}
			</div>
			<div class="hide" id="unsupported-browser">
			{{.i18n.Tr "u2f_unsupported_browser"}}
			</div>
			<div class="hide" id="u2f-error-1">
			{{.i18n.Tr "u2f_error_1"}}
			</div>
			<div class="hide" id="u2f-error-2">
			{{.i18n.Tr "u2f_error_2"}}
			</div>
			<div class="hide" id="u2f-error-3">
			{{.i18n.Tr "u2f_error_3"}}
			</div>
			<div class="hide" id="u2f-error-4">
			{{.i18n.Tr "u2f_error_4"}}
			</div>
			<div class="hide u2f-error-5">
			{{.i18n.Tr "u2f_error_5"}}
			</div>
		</div>
	</div>
	<div class="actions">
		<button onclick="window.location.reload()" class="success ui button hide u2f_error_5">{{.i18n.Tr "u2f_reload"}}</button>
		<div class="ui cancel button">{{.i18n.Tr "cancel"}}</div>
	</div>
</div>