Sorry for the delayed response, was on vacation at the time of your post and didn’t see it until now.
Please try starting fresh with the development snapshot as that contains a fix for that error. All you should have to do is remove the old script files and upload new ones.
If your site is live and running make sure you backup first. And you may wish to keep the old files and just upload the new ones over top but it would be better to just delete all the files and start fresh. Just keep the pixels folder and possibly manually migrate the config.php settings and I think that should hopefully be all.