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I'm having difficulties with a website that's running 7.14.
I did a backup with backup & migrate, installed a new instance of Drupal (7.40), installed the latest versions of all the modules used in the original website
I then restore the database (using backup & migrate also) but I can't create content or create/edit image styles. Whenever I try, I get this error message:

The website encountered an unexpected error. Please try again later.

Any ideas on what causes this error? Or how to solve it?

  • how you take backup – Adi Oct 16 '15 at 11:13
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    I have solved similar problem by running database updates. Please see your status report and dblogs as well. If you are using drush : drush updatedb – jas Oct 16 '15 at 11:14
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    did you run update.php – Adi Oct 16 '15 at 11:16
  • yourwebsite.com/update.php – No Sssweat Oct 16 '15 at 11:17
  • I ran update.php and still had the problem – FlashSP Oct 16 '15 at 13:51
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How To Update Drupal Core

Follow these instructions:

  1. Make a backup of your Drupal instance (database).
  2. Download the latest release of your current Drupal version.
  3. Extract the [tar ball or zip] Drupal package.
  4. Set your site on maintenance mode
  5. Delete all the files & folders inside your original Drupal instance except for /sites and its sub-folders. This assumes that all of your custom work - including themes - is in the recommended spot - the /sites folder tree. If you have made custom changes elsewhere you will need to either preserve them or plan to replace them later.
  6. Copy all the folders and files except /sites from inside the extracted Drupal package [tar ball or zip package] into your original Drupal instance location.
  7. Some updates do not include changes to setting.php and some do. See There is a way - Comment below for more on this. If the update release includes changes to settings.php you will need to replace your old settings.php in .../sites/default/ with the new one, and then edit the site-specific entries (eg database name, user, and password) in the setting file.
  8. If you have modified files such as .htaccess or robots.txt re-apply those changes to the new files.
  9. If you have a favicon.ico file that was deleted replace it too
  10. Login to your site as administrator or as user no 1
  11. Run update.php by navigating to http://...yourdrupalsitename/update.php and follow the process to update your Drupal instance
  12. Disable maintenance mode

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