Script output before doctype is causing errors

Hello. Thanks for this plugin, it’s very handy.

On the latest version, (and latest version of WordPress) this line:

$this->loader->add_action('enqueue_block_editor_assets', $plugin_admin, 'remove_publishing_sidebar_gutenberg');

is causing the script to be output before the <doctype> and that is causing some issues on the editing screen. I removed that line and all is working fine now. I don’t understand what that script is supposed to disable, but I think it should be optional. Thank you.