There’s a GitHub ticket at https://github.com/LemmyNet/lemmy/issues/506, but no tooling yet. You just have to manually copy out of your communities list unless you can figure out the API to dump your communities subs yourself. It obviously possible via the websockets API since the page displays it.
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Open-ended question
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Not ad nauseam inducing: please make sure it is a question that would be new to most members
Hoping to get an answer on this, I just did the same thing and manually resubscribed to them all.
There’s a GitHub ticket at https://github.com/LemmyNet/lemmy/issues/506, but no tooling yet. You just have to manually copy out of your communities list unless you can figure out the API to dump your communities subs yourself. It obviously possible via the websockets API since the page displays it.
Easiest way I can think of would be to go to the list of your subscribed communities and copy/paste them: https://lemmy.ml/communities/listing_type/Subscribed/page/1