Not authenticated - preview not available about next-sanity HOT 2 CLOSED

Been tooling with this issue many hours after following the guide https://www.sanity.io/guides/nextjs-live-preview.
I cloned the demo https://github.com/SimeonGriggs/sanity-nextjs-preview and got it to work with my local sanity setup. It turned out that I had done something in the FE part that Sanity did not like.

What fixed it for me was to refactor my FE to follow the cloned demo and then build it up again. My issue was most likely due to having multiple different sanity clients(multilang) and sharing the same config somehow.

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In case someone else sees this: I just wanted to add that I also used experimental spaces. This is likely the root of the problem here. The previewing works fine when running createPreviewSubscriptionHook syncronusly, but this does not work if you want to switch the dataset in the config later on.

By trying to wrap createPreviewSubscriptionHook in a function with a dataset parameter, it makes things go mad. I never found ut if it was due to it being async or some mixup with the createClient config vs createPreviewSubscriptionHook config.. However, I ended up scrapping the experimental spaces and just switching between datasets manually.

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