zulip/static/templates/message_feed_errors.hbs

<div class="history-limited-box">
    <p>
        <i class="fa fa-exclamation-circle" aria-hidden="true"></i>
        {{#tr}}
        Some older messages are unavailable.
        <z-link>Upgrade your organization</z-link>
        to access your full message history.
        {{#*inline "z-link"}}<a href="/plans/" target="_blank" rel="noopener noreferrer">{{> @partial-block}}</a>{{/inline}}
        {{/tr}}
    </p>
</div>
<div class="all-messages-search-caution" hidden>
    <p>
        <i class="fa fa-exclamation-circle" aria-hidden="true"></i>
        {{#tr}}
        End of results from your
        <z-link>history</z-link>.
        {{#*inline "z-link"}}<a href="/help/search-for-messages#searching-shared-history"
          target="_blank" rel="noopener noreferrer">{{> @partial-block}}</a>{{/inline}}
        {{/tr}}
        &nbsp;
        <span class="only-visible-for-spectators">
            {{#tr}}
            <z-link>Log in</z-link> to search your personal history.
            {{#*inline "z-link"}}<a href="/login/">{{> @partial-block}}</a>{{/inline}}
            {{/tr}}
        </span>
        <span class="hidden-for-spectators">
            {{#tr}}
            Consider <z-link>searching all public streams</z-link>.
            {{#*inline "z-link"}}<a class="search-shared-history" href="">{{> @partial-block}}</a>{{/inline}}
            {{/tr}}
        </span>
    </p>
</div>
<div class="empty_feed_notice_main"></div>