Client log:
client.txt

Mod is also crashing for me with the Tech Reborn Rubber tree on 2.1.2

15:02:09] [main/FATAL]: Reported exception thrown!
net.minecraft.class_148: Ticking block entity
at net.minecraft.class_1937.method_18471(class_1937.java:521) ~[intermediary-minecraft-1.16.5-client.jar:?]
at net.minecraft.class_638.method_18116(class_638.java:176) ~[intermediary-minecraft-1.16.5-client.jar:?]
at net.minecraft.class_310.method_1574(class_310.java:1556) ~[intermediary-minecraft-1.16.5-client.jar:?]
at net.minecraft.class_310.method_1523(class_310.java:1021) ~[intermediary-minecraft-1.16.5-client.jar:?]
at net.minecraft.class_310.method_1514(class_310.java:681) [intermediary-minecraft-1.16.5-client.jar:?]
at net.minecraft.client.main.Main.main(Main.java:215) [intermediary-minecraft-1.16.5-client.jar:?]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_221]
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_221]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_221]
at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_221]
at net.fabricmc.loader.game.MinecraftGameProvider.launch(MinecraftGameProvider.java:226) [fabric-loader-0.11.3.jar:?]
at net.fabricmc.loader.launch.knot.Knot.launch(Knot.java:146) [fabric-loader-0.11.3.jar:?]
at net.fabricmc.loader.launch.knot.KnotClient.main(KnotClient.java:28) [fabric-loader-0.11.3.jar:?]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_221]
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_221]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_221]
at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_221]
at org.multimc.onesix.OneSixLauncher.launchWithMainClass(OneSixLauncher.java:210) [NewLaunch.jar:?]
at org.multimc.onesix.OneSixLauncher.launch(OneSixLauncher.java:245) [NewLaunch.jar:?]
at org.multimc.EntryPoint.listen(EntryPoint.java:143) [NewLaunch.jar:?]
at org.multimc.EntryPoint.main(EntryPoint.java:34) [NewLaunch.jar:?]
Caused by: java.lang.RuntimeException: Could not find registered rubber tree feature!
at techreborn.world.RubberSaplingGenerator.method_11430(RubberSaplingGenerator.java:45) ~[TechReborn-1.16-3.8.4+build.236.jar:?]
at net.minecraft.class_2647.method_11431(class_2647.java:22) ~[intermediary-minecraft-1.16.5-client.jar:?]
at net.minecraft.class_2473.method_10507(class_2473.java:49) ~[intermediary-minecraft-1.16.5-client.jar:?]
at io.github.coolmineman.plantinajar.tree.TreeMan.genTree(TreeMan.java:48) ~[plantinajar-2.1.2.jar:?]
at io.github.coolmineman.plantinajar.JarBlockEntity.method_16896(JarBlockEntity.java:124) ~[plantinajar-2.1.2.jar:?]
at net.minecraft.class_1937.method_18471(class_1937.java:510) ~[intermediary-minecraft-1.16.5-client.jar:?]
... 20 more

any update on this? i planted one in a jar near my base on my modded server and can no longer load the chunks. Have to manually change my player location through the DAT file. 1.16.5

Hey Snappier! I'm gonna try and tackle this in my fork. Feel free to assist if you'd like!