Error when processing derivative image

I am running omeka 2.4.1 in Softaculous/AMPPS on windows 10 and have the following error when processing derivative image plugin

exception ‘RuntimeException’ with message ‘The configured PHP path () is invalid.’ in C:\Ampps\www\omeka2.4.1\application\libraries\Omeka\Job\Process\Dispatcher.php:114
Stack trace:
#0 C:\Ampps\www\omeka2.4.1\application\libraries\Omeka\Job\Process\Dispatcher.php(93): Omeka_Job_Process_Dispatcher::_checkCliPath(’’)
#1 C:\Ampps\www\omeka2.4.1\application\libraries\Omeka\Job\Process\Dispatcher.php(28): Omeka_Job_Process_Dispatcher::getPHPCliPath()
#2 C:\Ampps\www\omeka2.4.1\application\libraries\Omeka\Job\Dispatcher\Adapter\BackgroundProcess.php(31): Omeka_Job_Process_Dispatcher::startProcess(‘Omeka_Job_Proce…’, Object(User), Array)
#3 C:\Ampps\www\omeka2.4.1\application\libraries\Omeka\Job\Dispatcher\Default.php(150): Omeka_Job_Dispatcher_Adapter_BackgroundProcess->send(’{“className”:"D…’, Array)
#4 C:\Ampps\www\omeka2.4.1\plugins\DerivativeImages\controllers\IndexController.php(23): Omeka_Job_Dispatcher_Default->sendLongRunning(‘DerivativeImage…’, Array)
#5 C:\Ampps\www\omeka2.4.1\application\libraries\Zend\Controller\Action.php(516): DerivativeImages_IndexController->indexAction()
#6 C:\Ampps\www\omeka2.4.1\application\libraries\Zend\Controller\Dispatcher\Standard.php(308): Zend_Controller_Action->dispatch(‘indexAction’)
#7 C:\Ampps\www\omeka2.4.1\application\libraries\Zend\Controller\Front.php(954): Zend_Controller_Dispatcher_Standard->dispatch(Object(Zend_Controller_Request_Http), Object(Zend_Controller_Response_Http))
#8 C:\Ampps\www\omeka2.4.1\application\libraries\Zend\Application\Bootstrap\Bootstrap.php(105): Zend_Controller_Front->dispatch()
#9 C:\Ampps\www\omeka2.4.1\application\libraries\Zend\Application.php(384): Zend_Application_Bootstrap_Bootstrap->run()
#10 C:\Ampps\www\omeka2.4.1\application\libraries\Omeka\Application.php(79): Zend_Application->run()
#11 C:\Ampps\www\omeka2.4.1\admin\index.php(28): Omeka_Application->run()
#12 {main}

Grateful for any guidance

thanks

You probably need to set the php path in application/config/config.ini - you might see if Softaculous/AMPPS offers suggestions for configuring that based on various operating systems. (Hosting services usually have that info somewhere as well)