Learn how to fix the PS4 / PS5 Third Party Account not yet registered error Genshin Impact. This guide includes fixes to it, Mihoyo instructions, what to do, it's meaning, and more!!!PC & Mobile VS PS4 - Platform Differences
Third Party Account Not Yet Registered Error - What it Means
No Effect On Account
Although the error says that your Third Party Account is not registered, players don't have to worry because this has no effect on their account besides not being able to log in. Your account is pretty much safe!
Does Not Unlike Mihoyo Account With PSN
It also will not unlink your Mihoyo account from your PSN Account. You can still log-in to your account once the error has passed.
Third Party Account Not Yet Registered Error - Fix & Solution
Wait It Out
Unfortunately, the only way to "fix" this error is by simply waiting it out. It can take as little as a few minutes or as much as a few hours. No one knows where the time depends as well.
Mihoyo has issued a statement on this error in its Japanese twitter account. It acknowledged the problem but beyond confirmation of a future fix, there's really no solution.