This is probably a problem on Magma's end and not yours, but I thought I should share it anyways, in case if you have any ideas on how to resolve it. Upon startup on a Magma server, the game crashes. It runs fine on a normal Forge server with Terrarium.
crash-2020-07-03_12.17.24-server.txt

java.lang.NullPointerException: Exception ticking world at net.minecraft.world.WorldServer.func_72835_b(WorldServer.java:436) at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:971) at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:456) at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:861) at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:733) at java.lang.Thread.run(Thread.java:748)

I opened the issue on Magma's github as well. I hope you have a great day.
https://github.com/magmafoundation/Magma/issues/180

same here

This should be resolved in bddd0d2, I will release 1.1.6 shortly. 🙂

Thank you so much! After over an year, I can finally start my modded Earth server now. 💗

yea got the same problem