Today, an identical problem appeared to me.
Everything worked well yesterday. Today, it receives such an error for all classes of one of the plugins that I use.
My project has not been touched during this time. there was no update of any plugin or engine.
I do not know what’s going on completely, and I’ve tried everything. reinstallation, other versions of the plugin, file regenerate.
Any idea? Starting post is dated on 2016 so WTF?