Upgrading FreePBX 12 to 13 - Fatal error: Call to a member function getAll() on null in Freepbx_conf.class.php on line 216

Good day!

When i try run install -n command, i get following error in console

root@admin:~/freepbx# ./install -n

Strict Standards: Declaration of FreePBX\Install\FreePBXHelpCommand::setCommand() should be compatible with Symfony\Component\Console\Command\HelpCommand::setCommand(Symfony\Component\Console\Command\Command $command) in /root/freepbx/installlib/installhelpcommand.class.php on line 15
Assuming you are Database Root
Checking if SELinux is enabled...Its not (good)!
Reading /usr/local/etc/asterisk/asterisk.conf...Done
Checking if Asterisk is running and we can talk to it as the 'asterisk' user...Done
Preliminary checks done. Starting FreePBX Installation
Checking if this is a new install...No (/etc/amportal.conf file detected)

Fatal error: Call to a member function getAll() on null in /var/www/html/admin/libraries/BMO/Freepbx_conf.class.php on line 216

I did find in installcommand.class.php that 'dbpass' option was empty, i inserted mysql pass there, but error still exist.
What it can be?