网站遇到意外错误。请稍后重试。-- Drupal 从 8.9 升级到 9.3.5
我正在将我的 drupal 项目从 8.9 升级到 9.3.5，但升级后在访问网站时出现一个错误，即
网站遇到意外错误。请稍后重试。
我按照 drupal 站点中提到的步骤将 drupal 从 8 升级到 9 或（稍后）单击此处了解步骤，但对我不起作用。
有人可以帮助我或提供将 drupal 从 8.9 升级到 9.3.5 的正确步骤吗？
I am upgrading my drupal project from 8.9 to 9.3.5 but after the upgrade while hitting website one error occur i.e
The website encountered an unexpected error. Please try again later.
I followed the steps mentioned in the drupal site for upgrading drupal from 8 to 9 or (later) click here for steps but didn't work for me.
Will anyone please help me or provide proper steps to upgrade drupal from 8.9 to 9.3.5?
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您应该尝试获取有关该错误的更多信息。
添加到您的settings.php 文件：
并再次检查屏幕上的输出。
您也可以尝试 drush 查看从终端选择选项错误。
You should try to get more information about the error.
Add to your settings.php file:
and check the output on your screen again.
You may also try drush to take a look at selecting the option errors from the terminal.
我多次遇到同样的问题。如果您还没有这样做，请尝试多次访问 /update.php。 （它似乎清除了更新过程中的垃圾/剩余物并让它正常工作。）
除此之外，它总是某种文件问题。 （由于我的服务器设置，我仍然手动更新。）有时是文件夹/子文件夹未完全上传，有时是某些模块只是拒绝使用新的升级，直到更新为止。
I've run into this same issue multiple times. If you haven't already done so, try going to /update.php multiple times. (It seems to clear out the update process junk/leftovers and let it work.)
Other than that, it's always some kind of file issue. (I still update manually due to my server setup.) Sometimes it was a folder/sub folder that didn't upload fully or other times it was that some module simply refused to work with the new upgrade until that was updated.
尝试清除缓存，它对我有用。
在 Drupal 的根目录中运行命令
Drush 缓存：重建
Try to clear the cache, it worked for me.
In the root of the Drupal run the command
drush cache: rebuild
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