Sometimes you could despair, if Joomla display errors in the administration and you don't know, what is the cause of that. Be cool, every problem has a solution.The following overview describes the most common problems in Joomla, that happened to us in the last years. Maybe you can solve your problem with that.

If your server reports the "Call to undefined method JXMLElement::getElementByPath() in ... on line ..." error during a Joomla Extension installation, in most cases the cause of this message is, that your extension is not compatible to your Joomla version.

If your Joomla Administration spits out the "JInstaller: :Install: Cannot find XML setup file -  error" in the installation of a Joomla Extension, there are following two possibilities to solve it.