I'm getting this error message when viewing a Select Advanced field on one of my settings pages.
Uncaught Error: Option 'ajax' is not allowed for Select2 when attached to a <select> element.
I've read that there might be an issue with the Select2 version that Woocommerce uses.
If any additional information is required, please let me know.
I do not see that issue on my demo site with Meta Box, MB extensions and WooCommerce activated. You can try to deactivate all plugins except them and switch to the standard theme of WordPress (Twenty TwentyTwo) then re-check the issue.
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