500 Error when posting, moment.tz runtime error

Once the final version of 3.3.0-beta4 comes I’ll be sure to update and try again. This appears to only happen on specific posts using a special template, although we didn’t encounter any issues with it before. It’s just comprised of <kbd></kbd> buttons, [details="Summary"][/details]
`, and images. Nothing experimental, just core Discourse functions.

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