Sometimes, you may want to restrict access to certain articles—setting a password is a great solution.
Using this plugin, visitors must enter the correct password to be able to view the content on your site. If you do not want to protect the entire content, you can also set up areas that you want to restrict viewing (e.g. download links ...).
* This plugin is compatible with Joomla 3 to 6 + All versions of SP Page Buider.
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Install the plugin via the Joomla installer. Next, go to the plugin management section, find the plugin "System - Password for SP Page Buider" to start.

Next, add the pages you want to password protect. Under "Zone", you can choose "Page" if you want to protect all content or "Element" if you want to protect a part of the content.
ID is the "id" of the SP Page Builder item. You can find it in the SP Page Builder item list section.
Finally, set other basic parameters and remember to “Enable” this plugin to finish.
But still this old and ugly black player.
I ve bought the pro version, i have 5700 k2 items, and only approximately 4000 migrate successfully. When i try to rerun the migration to see if it migrates the remaining 1700, it re-migrates the already migrated, creating dublicates with differnt seo url.