I don't see that error on my demo site. Please try to clear all caches, deactivate all plugins except Meta Box, MB extension plugins, switch to a standard theme of WordPress and check this issue again.
so it took me a little but the problem is when you use a custom table with 'revision' => true on the metabox, you get the same error if you use the meta box AIO plugin and you create a custom post with revisions and add some custom field with a custom table and add revision => true to the meta box.
Thanks for the details.
I can reproduce the issue on the demo site and I've escalated this issue to the development team to fix it. I will get back to you soon.
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