icingaweb2/application/views/scripts/showConfiguration.phtml

<div>
  <h4><?= $this->translate('Saving Configuration Failed'); ?></h4>
  <p>
    <?= sprintf(
      $this->translate('The file %s couldn\'t be stored. (Error: "%s")'),
      $this->escape($filePath),
      $this->escape($errorMessage)
    ); ?>
    <br>
    <?= $this->translate('This could have one or more of the following reasons:'); ?>
  </p>
  <ul>
    <li><?= $this->translate('You don\'t have file-system permissions to write to the file'); ?></li>
    <li><?= $this->translate('Something went wrong while writing the file'); ?></li>
    <li><?= $this->translate('There\'s an application error preventing you from persisting the configuration'); ?></li>
  </ul>
</div>
<p>
  <?= $this->translate('Details can be found in the application log. (If you don\'t have access to this log, call your administrator in this case)'); ?>
  <br>
  <?= $this->translate('In case you can access the file by yourself, you can open it and insert the config manually:'); ?>
</p>
<p>
  <pre>
    <code><?= $this->escape($configString); ?></code>
  </pre>
</p>