Error “WebAssetManager is locked, you came late” in Joomla

I’m using Joomla 4.4, and this code to load a module to display it in a plugin.

echo JHtml::_('content.prepare', '{loadmoduleid 16}');

error

But the website say error WebAssetManager is locked, you came late

If I use {loadmoduleid 16} in a Joomla article it still working fine. I don’t sure what’s wrong?

Please help.

Thanks

WebAssetManager is locked, you came late