Error creating a world

[CurrentRiver]

Hello!

I get this error when I try and generate a world.

[Tue, 18. Jun 2019 20:52:01 MDT INFO] CurrentRiver issued server command: /ewg createworld staffworld

[Tue, 18. Jun 2019 20:52:18 MDT WARN] Plugin EpicWorldGenerator v8.0.0-SNAPSHOT-4 generated an exception while executing task 680951

Thank you all so much for any help you can offer.

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Also I was wondering if there is an update that allows me to go seamlessly from 1.12.2 to 1.14?