SERVER CRASH on load :
net.minecraftforge.fml.LoadingFailedException: Loading errors encountered: [
DimStorage (dimstorage) has failed to load correctly
java.lang.IllegalAccessError: no such constructor: edivad.dimstorage.blocks.DimTank.()void/newInvokeSpecial
]
at net.minecraftforge.fml.ModLoader.dispatchAndHandleError(ModLoader.java:201) ~[?:?] {re:classloading}
at net.minecraftforge.fml.ModLoader.gatherAndInitializeMods(ModLoader.java:183) ~[?:?] {re:classloading}
at net.minecraftforge.fml.server.ServerModLoader.begin(ServerModLoader.java:45) ~[?:?] {re:classloading}
at net.minecraft.server.dedicated.DedicatedServer.func_71197_b(DedicatedServer.java:122) ~[?:?] {re:classloading,pl:accesstransformer:B}
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:613) [?:?] {re:classloading,pl:accesstransformer:B,pl:runtimedistcleaner:A}
at java.lang.Thread.run(Thread.java:748) [?:1.8.0_202] {}

CLIENT CRASH :
it doesnt seems to be DimStorage related but my modpack works well with previous version
---- Minecraft Crash Report ----
// I'm sorry, Dave.

Time: 4/21/20 3:30 PM
Description: Initializing game

java.lang.NullPointerException: Registry Object not present: mekanism:basic_fluid_tank
at java.util.Objects.requireNonNull(Objects.java:290) ~[?:1.8.0_51] {}
at net.minecraftforge.fml.RegistryObject.get(RegistryObject.java:91) ~[?:?] {re:classloading}
at mekanism.common.registration.DoubleWrappedRegistryObject.getPrimary(DoubleWrappedRegistryObject.java:23) ~[?:?] {re:classloading}
at mekanism.common.registration.impl.BlockRegistryObject.getBlock(BlockRegistryObject.java:19) ~[?:?] {re:classloading}
at mekanism.client.ClientRegistrationUtil.registerBlockColorHandler(ClientRegistrationUtil.java:112) ~[?:?] {re:classloading}
at mekanism.client.ClientRegistration.registerItemColorHandlers(ClientRegistration.java:352) ~[?:?] {re:classloading}
at net.minecraftforge.eventbus.ASMEventHandler_484_ClientRegistration_registerItemColorHandlers_Item.invoke(.dynamic) ~[?:?] {}
at net.minecraftforge.eventbus.ASMEventHandler.invoke(ASMEventHandler.java:80) ~[eventbus-2.0.0-milestone.1-service.jar:?] {}
at net.minecraftforge.eventbus.EventBus.post(EventBus.java:258) ~[eventbus-2.0.0-milestone.1-service.jar:?] {}
at net.minecraftforge.fml.javafmlmod.FMLModContainer.acceptEvent(FMLModContainer.java:168) ~[?:31.1] {re:classloading}
at net.minecraftforge.fml.ModLoader.lambda$postEvent$30(ModLoader.java:243) ~[?:?] {re:classloading}
at net.minecraftforge.fml.ModLoader$$Lambda$5120/843325140.accept(Unknown Source) ~[?:?] {}
at java.util.HashMap.forEach(HashMap.java:1280) ~[?:1.8.0_51] {}
at net.minecraftforge.fml.ModList.forEachModContainer(ModList.java:217) ~[?:?] {re:classloading}
at net.minecraftforge.fml.ModLoader.postEvent(ModLoader.java:243) ~[?:?] {re:classloading}
at net.minecraftforge.client.ForgeHooksClient.onItemColorsInit(ForgeHooksClient.java:212) ~[?:?] {re:classloading}
at net.minecraft.client.renderer.color.ItemColors.func_186729_a(ItemColors.java:84) ~[?:?] {re:classloading,pl:runtimedistcleaner:A}
at net.minecraft.client.Minecraft.(Minecraft.java:421) [?:?] {re:classloading,pl:accesstransformer:B,pl:runtimedistcleaner:A}
at net.minecraft.client.main.Main.main(SourceFile:166) [?:?] {re:classloading}
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_51] {}
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_51] {}
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_51] {}
at java.lang.reflect.Method.invoke(Method.java:497) ~[?:1.8.0_51] {}
at net.minecraftforge.fml.loading.FMLClientLaunchProvider.lambda$launchService$0(FMLClientLaunchProvider.java:56) [forge-1.15.2-31.1.47.jar:31.1] {}
at net.minecraftforge.fml.loading.FMLClientLaunchProvider$$Lambda$461/1760443245.call(Unknown Source) [forge-1.15.2-31.1.47.jar:31.1] {}
at cpw.mods.modlauncher.LaunchServiceHandlerDecorator.launch(LaunchServiceHandlerDecorator.java:37) [modlauncher-5.0.0-milestone.4.jar:?] {}
at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:54) [modlauncher-5.0.0-milestone.4.jar:?] {}
at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:72) [modlauncher-5.0.0-milestone.4.jar:?] {}
at cpw.mods.modlauncher.Launcher.run(Launcher.java:81) [modlauncher-5.0.0-milestone.4.jar:?] {}
at cpw.mods.modlauncher.Launcher.main(Launcher.java:65) [modlauncher-5.0.0-milestone.4.jar:?] {}

Could you send me the full error on pastebin?

What version of TheOneProbe do you have installed?

The second log that you write, has nothing to do with DimStorage it seems a problem with mekanism: basic_fluid_tank