Solution of Joomla Error ‘the XML response that was returned from the server is invalid’

Problem: Countless folks get this error while they attempt to install Joomla! content management system – “Error: the XML response that was returned from the server is invalid

Solution # 1:

  1. Open php.ini file
  2. find this option setting –
    error_reporting = E_ALL

  3. change the above setting to –
    error_reporting = E_ALL & ~E_NOTICE

Solution # 2:

  1. Install Joomla without installing sample data.
  2. Do not delete the Installation folder after installation is done.
  3. Download the joomla.sql file from installation/sql/mysql or check joomla sample data folder - (…/yourjoomla/installation/sql/mysql/sample_data.sql)
  4. Use PHPmyAdmin to install this SQL file into your Database.
  5. If problem persist and Joomla installation force you to install sample data then edit sample_data.sql file and find
    TYPE=MyISAM

    and change to

    ENGINE=MyISAM
  6. If you have created or copied a configuration.php file from configuration.php file-dist due to warning message in beginning of installation page. Just remove ‘configuration.php’ file, and just ignore the warning message. Now you won’t see the ‘Error:the xml response that was returned from the server is invalid’ again.

Solution # 3:

  1. Check your PHP version. Joomla 1.5.x doesn’t support PHP 4.3.9, 4.4.2 or 5.0.4
  2. Check your PHP version. Joomla 2.5.x, 1.7.x and 1.6.x requires PHP 5.2.4 +, PHP 5.3 + recommended
  3. Joomla is not yet compatible with MySQL 6.x, check your mysql version

Still it is not working?

Solution # 4:

  1. From php.ini file, check that extensions are enabled
  2. In order to use SEO URLs, you will need to have the Apache mod_rewrite extension installed.
  3. Check your PHP setting from php.ini file, you can check memory limit setting for sure. Edit the php.ini file of your system and set the “memory_limit” to at least 256M or 512M. For shared hosting, you may need to contact your hosting provider to change this setting.
  4. Some systems have specific file permissions that might prevent a file from being readable. Find out the proper permissions for your hosting environment and apply them to the “…/yourjoomla/installation/sql/mysql/sample_data.sql” file or check Solution #2
  5. Make sure the database user has all permissions on the database used
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