Modpack crashed on creation of Mars dimension and continues to crash now when world is started.

Crash log is as followed
All mods are loaded.

cpw.mods.fml.common.LoaderException: java.lang.ClassNotFoundException: tterrag.supermassivetech.SuperMassiveTech
at cpw.mods.fml.common.LoadController.transition(LoadController.java:163)
at cpw.mods.fml.common.Loader.loadMods(Loader.java:544)
at cpw.mods.fml.client.FMLClientHandler.beginMinecraftLoading(FMLClientHandler.java:208)
at net.minecraft.client.Minecraft.func_71384_a(Minecraft.java:480)
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:878)
at net.minecraft.client.main.Main.main(SourceFile:148)
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.ClassNotFoundException: tterrag.supermassivetech.SuperMassiveTech
at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:191)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
at cpw.mods.fml.common.ModClassLoader.loadClass(ModClassLoader.java:58)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:348)
at cpw.mods.fml.common.FMLModContainer.constructMod(FMLModContainer.java:440)
at sun.reflect.GeneratedMethodAccessor4.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.EventSubscriber.handleEvent(EventSubscriber.java:74)
at com.google.common.eventbus.SynchronizedEventSubscriber.handleEvent(SynchronizedEventSubscriber.java:47)
at com.google.common.eventbus.EventBus.dispatch(EventBus.java:322)
at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:304)
at com.google.common.eventbus.EventBus.post(EventBus.java:275)
at cpw.mods.fml.common.LoadController.sendEventToModContainer(LoadController.java:212)
at cpw.mods.fml.common.LoadController.propogateStateMessage(LoadController.java:190)
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.EventSubscriber.handleEvent(EventSubscriber.java:74)
at com.google.common.eventbus.SynchronizedEventSubscriber.handleEvent(SynchronizedEventSubscriber.java:47)
at com.google.common.eventbus.EventBus.dispatch(EventBus.java:322)
at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:304)
at com.google.common.eventbus.EventBus.post(EventBus.java:275)
at cpw.mods.fml.common.LoadController.distributeStateMessage(LoadController.java:119)
at cpw.mods.fml.common.Loader.loadMods(Loader.java:513)
... 10 more
Caused by: java.lang.NoClassDefFoundError: com/enderio/core/IEnderMod
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:760)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:182)
... 37 more
Caused by: java.lang.ClassNotFoundException: com.enderio.core.IEnderMod
at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:101)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
... 41 more

A detailed walkthrough of the error, its code path and all known details is as follows:

-- System Details --
Details:
Minecraft Version: 1.7.10
Operating System: Windows 10 (amd64) version 10.0
Java Version: 1.8.0_51, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 321894200 bytes (306 MB) / 1195900928 bytes (1140 MB) up to 8112832512 bytes (7737 MB)
JVM Flags: 4 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx8704m -Xms256m -XX:PermSize=256m
AABB Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
FML: MCP v9.05 FML v7.10.99.99 Minecraft Forge 10.13.4.1614 83 mods loaded, 83 mods active
States: 'U' = Unloaded 'L' = Loaded 'C' = Constructed 'H' = Pre-initialized 'I' = Initialized 'J' = Post-initialized 'A' = Available 'D' = Disabled 'E' = Errored
UC mcp{9.05} [Minecraft Coder Pack] (minecraft.jar)
UC FML{7.10.99.99} [Forge Mod Loader] (forge-1.7.10-10.13.4.1614-1.7.10.jar)
UC Forge{10.13.4.1614} [Minecraft Forge] (forge-1.7.10-10.13.4.1614-1.7.10.jar)
UC CodeChickenCore{1.0.7.47} [CodeChicken Core] (minecraft.jar)
UC Micdoodlecore{} [Micdoodle8 Core] (minecraft.jar)
UC NotEnoughItems{1.0.5.120} [Not Enough Items] (NotEnoughItems-1.7.10-1.0.5.120-universal.jar)
UC OpenComputers|Core{1.6.0.9} [OpenComputers (Core)] (minecraft.jar)
UC OpenModsCore{0.9.1} [OpenModsCore] (minecraft.jar)
UC {000} [CoFH ASM] (minecraft.jar)
UC GalacticraftCore{3.0.12} [Galacticraft Core] (GalacticraftCore-1.7-3.0.12.463.jar)
UC SpaceCore{4.1.9} [4Space Core] (4Space-4.1.9-CUSTOM_1.jar)
UC ExoCore{0.1.2} [4Space Exoplanets Core] (4Space-4.1.9-CUSTOM_1.jar)
UC ExoElipse{0.1.2} [4Space Exoplanets Elipse] (4Space-4.1.9-CUSTOM_1.jar)
UC SpaceCallisto{4.1.9} [4Space Callisto] (4Space-4.1.9-CUSTOM_1.jar)
UC SpaceEuropa{4.1.9} [4Space Europa] (4Space-4.1.9-CUSTOM_1.jar)
UC SpaceVenus{4.1.9} [4Space Venus] (4Space-4.1.9-CUSTOM_1.jar)
UC SpaceIo{4.1.9} [4Space Io] (4Space-4.1.9-CUSTOM_1.jar)
UC SpaceMercury{4.1.9} [4Space Mercury] (4Space-4.1.9-CUSTOM_1.jar)
UC SpacePluto{4.1.9} [4Space Pluto] (4Space-4.1.9-CUSTOM_1.jar)
UC bspkrsCore{6.16} [bspkrsCore] ([1.7.10]bspkrsCore-universal-6.16.jar)
UC Treecapitator{1.7.10} [Treecapitator] ([1.7.10]Treecapitator-universal-2.0.4.jar)
UC armourersWorkshop{1.7.10-0.42.4} [Armourer's Workshop] (Armourers-Workshop-1.7.10-0.42.4.jar)
UC plushieWrapper{0.0.0} [Plushie Wrapper] (Armourers-Workshop-1.7.10-0.42.4.jar)
UC CoFHCore{1.7.10R3.1.3} [CoFH Core] (CoFHCore-[1.7.10]3.1.3-327.jar)
UC AwesomeSauceCore{0.1.0} [AwesomeSauce Core] (AwesomeSauceCore-1.7.x-b52.jar)
UC AwesomeSauceComponents{0.1.0} [AwesomeSauce Components] (AwesomeSauceCore-1.7.x-b52.jar)
UC bdlib{1.9.4.109} [BD Lib] (bdlib-1.9.4.109-mc1.7.10.jar)
UC betterstorage{0.13.1.127} [BetterStorage] (BetterStorage-1.7.10-0.13.1.127.jar)
UC AWWayofTime{v1.3.3} [Blood Magic: Alchemical Wizardry] (BloodMagic-1.7.10-1.3.3-17.jar)
UC chisel{2.9.5.11} [Chisel] (Chisel-2.9.5.11.jar)
UC CarpentersBlocks{3.3.8.1} [Carpenter's Blocks] (Carpenter's Blocks v3.3.8.1 - MC 1.7.10.jar)
UC CustomMainMenu{1.9.2} [Custom Main Menu] (CustomMainMenu-MC1.7.10-1.9.2.jar)
UC thedalekmod{39.75} [The Dalek Mod] (Dalek_Mod_1710.jar)
UC darkcore{0.41} [Dark Core] (darkcore-0.41-180.jar)
UC ImmibisCore{59.1.4} [Immibis Core] (immibis-core-59.1.4.jar)
UC DimensionalAnchors{59.0.3} [Dimensional Anchors] (dimensional-anchor-59.0.3.jar)
UC dimstorage{1.3} [DimStorage] (DimStorage-1.7.2-1.3.jar)
UC Eln{@Version@} [Electrical Age] (ElectricalAge-1.12.0.jar)
UC exnihilo{1.38-53} [Ex Nihilo] (Ex-Nihilo-1.38-53.jar)
UC exastrisrebirth{MC1.7.10-1.01-null} [Ex Astris Rebirth] (Ex-Astris-Rebirth-MC1.7.10-1.01-null.jar)
UC ExtraUtilities{1.2.12} [Extra Utilities] (extrautilities-1.2.12.jar)
UC MineTweaker3{3.0.10} [MineTweaker 3] (MineTweaker3-1.7.10-3.0.10B.jar)
UC Waila{1.5.10} [Waila] (Waila-1.5.10_1.7.10.jar)
UC FTBL{1.0.18.2} [FTBLib] (FTBLib-1.7.10-1.0.18.3.jar)
UC FTBU{1.0.18.2} [FTBUtilities] (FTBUtilities-1.7.10-1.0.18.3.jar)
UC GalacticraftMars{3.0.12} [Galacticraft Planets] (Galacticraft-Planets-1.7-3.0.12.463.jar)
UC GalacticScience_Tweaks{1.4} [GalacticScience-Tweaks] (GalacticScience_Tweaks-1.5.jar)
UC minechem{5.0.5.406} [Minechem] (Minechem-1.7.10-5.0.5.406.jar)
UC advgenerators{0.9.20.123} [Advanced Generators] (generators-0.9.20.123-mc1.7.10.jar)
UC GregsLighting{1.11.2} [Greg's Lighting] (GregsLighting-1.11.2-mc1.7.10.jar)
UC hardcoremapreset{2.2.0} [HardcoreMapReset] (HardCoreMapReset-2.2.0.jar)
UC HardcoreQuesting{4.4.4} [Hardcore Questing Mode] (HQM-The Journey-4.4.4.jar)
UC inpure|core{1.7.10R1.0.0B9} [INpureCore] (INpureCore-[1.7.10]1.0.0B9-62.jar)
UC inventorytweaks{1.59-dev-152-cf6e263} [Inventory Tweaks] (InventoryTweaks-1.59-dev-152.jar)
UC IronChest{6.0.62.742} [Iron Chest] (ironchest-1.7.10-6.0.62.742-universal.jar)
UC JABBA{1.2.2} [JABBA] (Jabba-1.2.2_1.7.10.jar)
UC launchgui{1.7.10-2.0-18} [LaunchGUI] (LaunchGui-1.7.10-2.0-18-client.jar)
UC Mantle{1.7.10-0.3.2.jenkins191} [Mantle] (Mantle-1.7.10-0.3.2b.jar)
UC modtweaker2{0.9.6} [Mod Tweaker 2] (ModTweaker2-0.9.6.jar)
UC NEIAddons{1.12.15.41} [NEI Addons] (neiaddons-1.12.15.41-mc1.7.10.jar)
UC NEIAddons|Developer{1.12.15.41} [NEI Addons: Developer Tools] (neiaddons-1.12.15.41-mc1.7.10.jar)
UC NEIAddons|AppEng{1.12.15.41} [NEI Addons: Applied Energistics 2] (neiaddons-1.12.15.41-mc1.7.10.jar)
UC NEIAddons|Botany{1.12.15.41} [NEI Addons: Botany] (neiaddons-1.12.15.41-mc1.7.10.jar)
UC NEIAddons|Forestry{1.12.15.41} [NEI Addons: Forestry] (neiaddons-1.12.15.41-mc1.7.10.jar)
UC NEIAddons|CraftingTables{1.12.15.41} [NEI Addons: Crafting Tables] (neiaddons-1.12.15.41-mc1.7.10.jar)
UC NEIAddons|ExNihilo{1.12.15.41} [NEI Addons: Ex Nihilo] (neiaddons-1.12.15.41-mc1.7.10.jar)
UC Netherless{0.9.0} [Netherless] (Netherless-0.9.0.jar)
UC NuclearCraft{1.9d} [NuclearCraft] (NuclearCraft-1.9d--1.7.10.jar)
UC OpenComputers{1.6.0.9} [OpenComputers] (OpenComputers-MC1.7.10-1.6.0.9-universal.jar)
UC OpenAutomation{1.7.x-b218} [OpenAutomation] (OpenAutomation-1.7.x-b218.jar)
UC OpenMods{0.9.1} [OpenMods] (OpenModsLib-1.7.10-0.9.1.jar)
UC OpenBlocks{1.5.1} [OpenBlocks] (OpenBlocks-1.7.10-1.5.1.jar)
UC progressiveautomation{1.6.35} [Progressive Automation] (ProgressiveAutomation-1.7.10-1.6.35.jar)
UC quantumflux{1.7.10-1.3.4} [QuantumFlux] (QuantumFlux-1.7.10-1.3.4.jar)
UC RandomThings{2.2.4} [Random Things] (RandomThings-2.2.4.jar)
UC RefinedRelocation{1.1.28} [Refined Relocation] (RefinedRelocation-mc1.7.10-1.1.28.jar)
UC ResourceLoader{1.3} [Resource Loader] (ResourceLoader-MC1.7.10-1.3.jar)
UC rftools{4.23} [RFTools] (rftools-4.23.jar)
UC RouterReborn{1.2.0.43} [Router Reborn] (RouterReborn-1.7.10-1.2.0.43-universal.jar)
UC SGCraft{1.11.3} [Greg's SG Craft] (SGCraft-1.11.3-mc1.7.10.jar)
UC SolarFlux{1.7.10-0.8b} [Solar Flux] (SolarFlux-1.7.10-0.8b.jar)
UE superMassiveTech{MC1.7.10-0.4.0-alpha-114} [Super Massive Tech] (SuperMassiveTech-MC1.7.10-0.4.0-beta-114.jar)
UC TardisMod{0.995} [Tardis Mod] (tardismod-1.7.10-0.995-350.jar)
GL info: ' Vendor: 'Intel' Version: '4.5.0 - Build 22.20.16.4836' Renderer: 'Intel(R) UHD Graphics 620'
OpenModsLib class transformers: [stencil_patches:FINISHED],[movement_callback:FINISHED],[map_gen_fix:ENABLED],[gl_capabilities_hook:FINISHED],[player_render_hook:FINISHED]
Class transformer null safety: all safe
CoFHCore: -[1.7.10]3.1.3-327
Mantle Environment: Environment healthy.

If someone still have this issue, it may caused by this :

Caused by: java.lang.ClassNotFoundException: com.enderio.core.IEnderMod

Double-check if you have endercore installed.
https://www.curseforge.com/minecraft/mc-mods/endercore/files?sort=game-version

I'm unable to reproduce this.