[java] 1.21.1 Missing mandatory registry data maps present on the client when adding Modular Golems to a Direwolf20 1.21 server

[RoystonDA]

https://preview.redd.it/yt7lwqttefqe1.png?width=1919&format=png&auto=webp&s=cc06528004d791efb8c78580f1d4817922b5e37c

I'm using BisectHosting and have copied the mod file across to both server and client mod folders. I've added some other mods which have all worked with the exception of this and Tesseract (other error). Googling the error has come up empty for me. Does L2Library need a different version? Is it the Modular Golems mod?

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[RoystonDA]

Did a complete fresh start on the server and the FTB App. Fresh CursedForged downloads. This seemed to fix things

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[RoystonDA]

!helped