Hello,

after installing the update of the components on master site, in slaves sites installation doesn't proceed.

It throws the warnings:


Strict Standards: Declaration of Jms2WinError::isError() should be compatible with JError::isError($object) in master1608/public_html/administrator/components/com_multisites/libraries/joomla/jms2winfactory.php on line 90

Strict Standards: Declaration of JInstallerMultisites::getInstance() should be compatible with & JInstaller::getInstance($basepath = '/home/tcc3...', $classprefix = 'JInstaller...', $adapterfolder = 'adapter') in master1608/public_html/administrator/components/com_multisites/libraries/joomla/installer/installer_multisites.php(581) : eval()'d code on line 1

Strict Standards: Only variables should be assigned by reference in master1608/public_html/includes/defines_multisites.php(8) : eval()'d code on line 1
Error displaying the error page: Application Instantiation Error: Failed to start the session because headers have already been sent by "master1608/public_html/administrator/components/com_multisites/libraries/joomla/jms2winfactory.php" at line 90.

and it stays at this white page.

The problem comes from the fact that you display the "PHP Strict" warnings upon screen and that after the session fails because something is displayed.

To avoid that, change your PHP configuration to avoid display the error upon screen.
Just let them go into a "error_log" file.

As you didn't specified the JMS taht you are using, we are not able to verify if this is related to an older version or in the latest version.
You also didn't specified the Joomla version that you used.

Therefore, we can only suggest to avoid display the error upon screen.