Hi

When I try to install Concrete5 version 5.7.2 it allways stops halfway, with the following errormessage:

Class \Concrete\Core\Gathering\DataSource\TwitterDataSource does not exist.

Trace:
#0 /home/vhosts/eh2.eu5.org/concrete/vendor/illuminate/container/Illuminate/Container/Container.php(501): ReflectionClass->__construct('\Concrete\Core\...') #1 /home/vhosts/eh2.eu5.org/concrete/vendor/illuminate/container/Illuminate/Container/Container.php(425): Illuminate\Container\Container->build('\Concrete\Core\...', Array) #2 /home/vhosts/eh2.eu5.org/concrete/src/Support/Facade/Facade.php(113): Illuminate\Container\Container->make('\Concrete\Core\...') #3 /home/vhosts/eh2.eu5.org/concrete/src/Gathering/DataSource/DataSource.php(30): Concrete\Core\Support\Facade\Facade::__callStatic('make', Array) #4 /home/vhosts/eh2.eu5.org/concrete/src/Gathering/DataSource/DataSource.php(30): Concrete\Core\Support\Facade\Application::make('\Concrete\Core\...') #5 /home/vhosts/eh2.eu5.org/concrete/src/Gathering/DataSource/DataSource.php(128): Concrete\Core\Gathering\DataSource\DataSource::getByID('4') #6 /home/vhosts/eh2.eu5.org/concrete/src/Backup/ContentImporter.php(899): Concrete\Core\Gathering\DataSource\DataSource::add('twitter', 'Twitter', NULL) #7 /home/vhosts/eh2.eu5.org/concrete/src/Backup/ContentImporter.php(86): Concrete\Core\Backup\ContentImporter->importGatheringDataSources(Object(SimpleXMLElement)) #8 /home/vhosts/eh2.eu5.org/concrete/src/Backup/ContentImporter.php(60): Concrete\Core\Backup\ContentImporter->doImport(Object(SimpleXMLElement)) #9 /home/vhosts/eh2.eu5.org/concrete/src/Package/StartingPointPackage.php(102): Concrete\Core\Backup\ContentImporter->importContentFile('/home/vhosts/eh...') #10 [internal function]: Concrete\Core\Package\StartingPointPackage->install_gathering() #11 /home/vhosts/eh2.eu5.org/concrete/controllers/install.php(283): call_user_func(Array) #12 [internal function]: Concrete\Controller\Install->run_routine('elemental_full', 'install_gatheri...') #13 /home/vhosts/eh2.eu5.org/concrete/src/Controller/AbstractController.php(156): call_user_func_array(Array, Array) #14 /home/vhosts/eh2.eu5.org/concrete/src/Routing/ControllerRouteCallback.php(25): Concrete\Core\Controller\AbstractController->runAction('run_routine', Array) #15 /home/vhosts/eh2.eu5.org/concrete/src/Routing/Router.php(59): Concrete\Core\Routing\ControllerRouteCallback->execute(Object(Concrete\Core\Http\Request), Object(Concrete\Core\Routing\Route), Array) #16 /home/vhosts/eh2.eu5.org/concrete/src/Support/Facade/Facade.php(116): Concrete\Core\Routing\Router->execute(Object(Concrete\Core\Routing\Route), Array) #17 /home/vhosts/eh2.eu5.org/concrete/src/Application/Application.php(350): Concrete\Core\Support\Facade\Facade::__callStatic('execute', Array) #18 /home/vhosts/eh2.eu5.org/concrete/src/Application/Application.php(350): Concrete\Core\Support\Facade\Route::execute(Object(Concrete\Core\Routing\Route), Array) #19 /home/vhosts/eh2.eu5.org/concrete/bootstrap/start.php(196): Concrete\Core\Application\Application->dispatch(Object(Concrete\Core\Http\Request)) #20 /home/vhosts/eh2.eu5.org/concrete/dispatcher.php(36): require('/home/vhosts/eh...') #21 /home/vhosts/eh2.eu5.org/index.php(2): require('/home/vhosts/eh...') #22 {main}

I've tried to install on several servers, and different versions of mysql, but never got anyway past this point. (I've succeeded in installing version 5.7.0, and then upgraded to version 5.7.0.4, with several errors. But nevertheless, it worked.) But from version 5.7.1 and up to now, it hasn't worked at all.

I'm now using mysql version 5.6, and php 5.4.