A recent update to the T3 may result in a blank page for your Joomla 3 installation if you are running an installation less than Joomla 3.3. This is a bit of an edge case and one that we are yet to see in the wild but a number of tests on our quickstart packages locally have produced the error.
The bug can be reproduced by updating to T3 v2.3+ in Joomla 3.1 or Joomla 3.2. If you have error reporting set to maximum in your global configuration you will see this error:
Fatal error: Call to undefined method JLayoutFile::setOptions() in path/to/installation/plugins/system/t3/includes/joomla25/layout/file.php on line 61
Otherwise the error will result in a blank page.
The solution in this case is to update your Joomla 3 installation to Joomla 3.3+ using Joomla's built in installer.
- Navigate to the components > Joomla update menu
You should see an update available. Depending on your current version it will show Joomla 3.2 or Joomla 3.3.
- Click install the update.
If the previous update updated your install to Joomla 3.2.4 you need to repeat the previous steps.
Go to the Joomla update menu again.
- The update to Joomla 3.3. should now be available. If it's not available you may need to purge the cache using the purge cache button.
Once the update to Joomla 3.3.1 is available hit the Install the Update button.
- Once your site has been updated to Joomla 3.3.1 visit the front of your site and your site should display as expected.
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