preview_token_expired

401 authentication. The preview token was real but has expired.

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HTTP status	`type`	Surfaces
401	`authentication`	REST

What it means

The preview token was real but has expired.

When
older than an hour

Open a fresh preview link from the Capa editor.

preview_token_invalid

401 authentication. The preview token is forged, mangled or for another project.

subscription_required

402 payment. The project's plan does not include API access right now.