1. It's still only a missing file issue. The copy simply fails or there is a permission/ownership issue with the copy process. I've also seen hosts blocking certain files, so it might be that? The problem is not related to a plugin failure, simply the copy process fails for some reason. If changing permissions, checking file ownerships via SSH does not work, simply re-install the plugin, it usually clears these issues.
2. Unfortunately I cannot authorize a re-fund for this reason, I'm sorry.Best,
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