Game crashes with EnderCore (v0.5.73) and Regeneration (v2.1.2) installed.
The crash report is the following:

Time: 3/28/20 11:28 PM
Description: There was a severe problem during mod loading that has caused the game to fail

net.minecraftforge.fml.common.LoaderExceptionModCrash: Caught exception from EnderCore (endercore)
Caused by: java.lang.RuntimeException: java.lang.NullPointerException
at com.enderio.core.common.config.ConfigProcessor.process(ConfigProcessor.java:202)
at com.enderio.core.common.config.ConfigHandler.init(ConfigHandler.java:152)
at com.enderio.core.common.config.AbstractConfigHandler.initialize(AbstractConfigHandler.java:96)
at com.enderio.core.EnderCore.preInit(EnderCore.java:125)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at net.minecraftforge.fml.common.FMLModContainer.handleModStateEvent(FMLModContainer.java:637)
at sun.reflect.GeneratedMethodAccessor3.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at com.google.common.eventbus.Subscriber.invokeSubscriberMethod(Subscriber.java:91)
at com.google.common.eventbus.Subscriber$SynchronizedSubscriber.invokeSubscriberMethod(Subscriber.java:150)
at com.google.common.eventbus.Subscriber$1.run(Subscriber.java:76)
at com.google.common.util.concurrent.MoreExecutors$DirectExecutor.execute(MoreExecutors.java:399)
at com.google.common.eventbus.Subscriber.dispatchEvent(Subscriber.java:71)
at com.google.common.eventbus.Dispatcher$PerThreadQueuedDispatcher.dispatch(Dispatcher.java:116)
at com.google.common.eventbus.EventBus.post(EventBus.java:217)
at net.minecraftforge.fml.common.LoadController.sendEventToModContainer(LoadController.java:219)
at net.minecraftforge.fml.common.LoadController.propogateStateMessage(LoadController.java:197)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at com.google.common.eventbus.Subscriber.invokeSubscriberMethod(Subscriber.java:91)
at com.google.common.eventbus.Subscriber$SynchronizedSubscriber.invokeSubscriberMethod(Subscriber.java:150)
at com.google.common.eventbus.Subscriber$1.run(Subscriber.java:76)
at com.google.common.util.concurrent.MoreExecutors$DirectExecutor.execute(MoreExecutors.java:399)
at com.google.common.eventbus.Subscriber.dispatchEvent(Subscriber.java:71)
at com.google.common.eventbus.Dispatcher$PerThreadQueuedDispatcher.dispatch(Dispatcher.java:116)
at com.google.common.eventbus.EventBus.post(EventBus.java:217)
at net.minecraftforge.fml.common.LoadController.distributeStateMessage(LoadController.java:136)
at net.minecraftforge.fml.common.Loader.preinitializeMods(Loader.java:629)
at net.minecraftforge.fml.client.FMLClientHandler.beginMinecraftLoading(FMLClientHandler.java:252)
at net.minecraft.client.Minecraft.func_71384_a(Minecraft.java:467)
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:378)
at net.minecraft.client.main.Main.main(SourceFile:123)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
at net.minecraft.launchwrapper.Launch.main(Launch.java:28)
Caused by: java.lang.NullPointerException
at me.swirtzly.regeneration.common.item.arch.capability.ArchProvider.serializeNBT(ArchProvider.java:35)
at me.swirtzly.regeneration.common.item.arch.capability.ArchProvider.serializeNBT(ArchProvider.java:14)
at net.minecraftforge.common.capabilities.CapabilityDispatcher.serializeNBT(CapabilityDispatcher.java:123)
at net.minecraft.item.ItemStack.func_77946_l(ItemStack.java:396)
at net.minecraftforge.oredict.ShapelessOreRecipe.(ShapelessOreRecipe.java:67)
at com.enderio.core.common.tweaks.Tweaks$5.load(Tweaks.java:75)
at com.enderio.core.common.tweaks.Tweak.enable(Tweak.java:55)
at com.enderio.core.common.tweaks.Tweaks.load(Tweaks.java:102)
at com.enderio.core.common.tweaks.Tweaks.loadNonIngameTweaks(Tweaks.java:87)
at com.enderio.core.common.config.ConfigHandler.reloadNonIngameConfigs(ConfigHandler.java:162)
at com.enderio.core.common.config.AbstractConfigHandler.reloadAllConfigs(AbstractConfigHandler.java:140)
at com.enderio.core.common.config.ConfigHandler.callback(ConfigHandler.java:167)
at com.enderio.core.common.config.ConfigProcessor.process(ConfigProcessor.java:199)
... 43 more

That crash report is to do with enderios config and has no mention of my mod, I'm going to close this for now until further evidence is given.