Scheduler works fine in Frontend, but not in Backend


I’ve just noticed that in the Joomla backend of scheduler I can’t administer events. When opening the component, a window pops up, showing me data like:

The “events administration” window shows no events and clicken on “reload” reproduces the error.

The error log shows the following information:

Adding, changing and deleting events in the frontend work perfectly, though.

Any ideas about how to fix this?


It seems that something corrupts the xml output in backend. ( alert with xml data appears when xml can’t be processed correctly )

If you have made any changes to server side code - it may be caused because of some extra white-spaces or new lines outside of <?php ?> tags