https://github.com/frank89722/JourneyMapIntegration/blob/main/Fabric/src/main/java/me/frankv/jmi/mixin/MouseHandlerMixin.java#L23 doesn't check if the hitResult is null, this normally doesn't happen in vanilla but it's marked as @nullable and some mods seem to set it to null which sometimes causes random crashes

Thank you for the report!