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Why am I getting error on JoomSEF extension installation?

April 26, 2017Error extension installation joomsef

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Why am I getting error on JoomSEF extension installation?

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When trying to install JoomSEF extension, I am getting error message like: Warning: JInstaller::require_once(…/libraries/joomla/installer/adapters/sef_ext.php) [jinstaller.require-once]: failed to open stream: No such file or directory in …/libraries/joomla/installer/installer.php on line 216 This error will appear when you are trying to install JoomSEF extensions via Joomla default installer. All JoomSEF extension has to be installed via JoomSEF installer, accesible from JoomSEF control panel in backend. For details, please refer to JoomSEF Documentation – Extension installation.