We reply in the forum when we have available time.
Sorry but the priority is given to billable support.
If you want a faster reply, you can buy our support at
www.jms2win.com/en/joomla-multisite?page...35&category_id=1
So if the slave site URL is the
mastersite/multisites/slavesite/hello.php
then, you need to verify in this directory that you have a "configuration.php" or at least a /installation directory.
If none are there then you will have the message "no configuration or no installation directory".
If you don't have the "/installation" in the master then it is impossible to have the /installation in the slave site as the slave site needs to create a symbolic link on the /installation directory present in the master.
Normally, when you go in JMS, you should see that the patches are not installed.
This message is displayed when the /installation directory is missing or other patches.
If you didn't installed the JMS patches then you didn't restored the /installation directory.
You can also restore the /installation directory from the original joomla zip file.
So go in the JMS "check patches" menu to verify that you have installed the patches that include the restore of the /installation directory