I'm trying since yesterday to do what is explained in this tutoriel :
https://www.scirra.com/tutorials/70/off ... t-2?page=1
but it still don't work.
I added the type mime text/cache-manifest for the extension .appcache on my server (Planethoster) but nothing changes.
Is this feature still working now for someone ?
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I've just tried and it seems to work now.