We have now opened a commercial services section here on the forum for registered users. If you have a Fabrik project that you wish to have someone work on for you, post it under Help Wanted. If you are an application developer and wish to earn some money helping others, post your details under Fabrik Application Developers.
Both of these are unmoderated. It will be up to both parties to work out the details and come to an agreement.
For running J!5.1 you must https://fabrikar.com/forums/index.php?wiki/update-from-github/ or include the new file manually https://fabrikar.com/forums/index.php?threads/joomla-5-1-and-fabrik-cannot-find-files-error.54473/post-285151 See also Announcements
$user = JFactory::getUser();
if($user->get('guest') == 1)
{
$app = JFactory::getApplication();
$url = 'url_of_your_registration_form';
$msg = 'You have to be registered to fill this form';
$app->redirect($url, $msg);
}
So why do you show the menu item to the public user? Set the menu access to registered.If the user clicking the menu is registered, then he can see the form. If he is not registered, then he can't see the form.