Thanks for your support question. I apologise for the delay.
We see these errors from time to time and they can be caused by various means. Some due to syntax errors in the code blocks and others via unresolved errors within the plugin itself. This is generally not an issue, as these generated errors (or warnings) do not pose problems. That said, recently we have been dedicating more development on capturing and handling errors better, and also making the installer and uninstaller a lot more robust. Our aims are to make the plugin a lot more robust in general.