@MojangSupport local multiplayer is broken in PS4. Has been for several weeks now.
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Replying to @JohnPlaysDF
We'd be happy to help once we have more info! Do you get an error message when trying to play multiplayer? If so, can you grab a screenshot for me? ^BT

Jan 15, 2023 · 7:34 PM UTC

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Replying to @MojangSupport
It’s for local multiplayer. No error message. We try to log in with a second controller. The split screen flashes up, then immediately goes away.
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Gotcha. In that case, can you reach out to our tech team so they can have a look? To keep your information secure, please complete our request form at aka.ms/Minecraft-Support so we can quickly and safely assist with your question! ^BT