Well, what I see is pretty big ^^' I hope you will know what's going on :
PHP <div class="baseHtml"><h4>Template Errors: ScheduledPost_thread_edit</h4><ol>
<li><i>Illegal string offset 'hour'</i> in /var/www/clients/client4/web3/web/library/XenForo/Template/Abstract.php(265) : eval()'d code, line 86: <pre>85: $__compilerVar4 = '';
86: $__compilerVar4 .= htmlspecialchars($hourInfo['hour'], ENT_QUOTES, 'UTF-8');
87: $__compilerVar5 = '';
</pre></li>
<li><i>Illegal string offset 'minute'</i> in /var/www/clients/client4/web3/web/library/XenForo/Template/Abstract.php(265) : eval()'d code, line 88: <pre>87: $__compilerVar5 = '';
88: $__compilerVar5 .= htmlspecialchars($hourInfo['minute'], ENT_QUOTES, 'UTF-8');
89: $__compilerVar6 = '';
</pre></li>
</ol></div>