Caused by: java.lang.NullPointerException: Cannot invoke "java.util.Map.keySet()" because the return value of "io.swagger.v3.oas.models.media.Discriminator.getMapping ...
The error will lag my Minecraft for about 10 seconds, it will say application not responce. [14:21:53] [Thread-22/ERROR]: java.lang.NullPointerException: Cannot ...
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