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You must be confusing Morpheus and Morph, it is no longer in the pack since 1.0.2.
Though if you want it for your server just download it and add it to the server, and the clients will need to add it as well.
This can be fixed by updating Forge Multipart to 1.0.0.214, though the latest release 1.0.0.220 is working aswell
https://github.com/Chicken-Bones/ForgeMultipart/issues/114
If we could get an update to the pack to resolve this it would make my day!!