Exception message: java.lang.ClassNotFoundException: team.lodestar.lodestone.systems.rendering.particle.screen.emitter.ItemParticleEmitter
...only logical since there is no such class in src/main/java/team/lodestar/lodestone/systems/rendering...
I believe, it has been moved into somewhere here src/main/java/team/lodestar/lodestone/systems/particle/screen

Crash log?

same thing here
malum 1.4.4.3 and lodestone 1.4 are installed

[15:58:10] [modloading-worker-0/ERROR] [ne.mi.fm.ja.FMLModContainer/LOADING]: Failed to create mod instance. ModID: malum, class com.sammy.malum.MalumMod
java.lang.reflect.InvocationTargetException: null
at jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[?:?] {}
at jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:77) ~[?:?] {}
at jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) ~[?:?] {}
at java.lang.reflect.Constructor.newInstanceWithCaller(Constructor.java:499) ~[?:?] {}
at java.lang.reflect.Constructor.newInstance(Constructor.java:480) ~[?:?] {}
at net.minecraftforge.fml.javafmlmod.FMLModContainer.constructMod(FMLModContainer.java:67) ~[javafmllanguage-1.18.2-40.2.0.jar%23150!/:?] {}
at net.minecraftforge.fml.ModContainer.lambda$buildTransitionHandler$4(ModContainer.java:106) ~[fmlcore-1.18.2-40.2.0.jar%23149!/:?] {re:mixin}
at java.util.concurrent.CompletableFuture$AsyncRun.run(CompletableFuture.java:1804) [?:?] {}
at java.util.concurrent.CompletableFuture$AsyncRun.exec(CompletableFuture.java:1796) [?:?] {}
at java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:373) [?:?] {}
at java.util.concurrent.ForkJoinPool$WorkQueue.topLevelExec(ForkJoinPool.java:1182) [?:?] {}
at java.util.concurrent.ForkJoinPool.scan(ForkJoinPool.java:1655) [?:?] {re:mixin,re:computing_frames}
at java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1622) [?:?] {re:mixin,re:computing_frames}
at java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:165) [?:?] {re:mixin}
Caused by: java.lang.NoClassDefFoundError: team/lodestar/lodestone/systems/rendering/particle/screen/emitter/ItemParticleEmitter
at java.lang.ClassLoader.defineClass1(Native Method) ~[?:?] {}
at java.lang.ClassLoader.defineClass(ClassLoader.java:1012) ~[?:?] {}
at cpw.mods.cl.ModuleClassLoader.readerToClass(ModuleClassLoader.java:116) ~[securejarhandler-1.0.3.jar:?] {}
at cpw.mods.cl.ModuleClassLoader.lambda$findClass$16(ModuleClassLoader.java:216) ~[securejarhandler-1.0.3.jar:?] {}
at cpw.mods.cl.ModuleClassLoader.loadFromModule(ModuleClassLoader.java:226) ~[securejarhandler-1.0.3.jar:?] {}
at cpw.mods.cl.ModuleClassLoader.findClass(ModuleClassLoader.java:216) ~[securejarhandler-1.0.3.jar:?] {}
at cpw.mods.cl.ModuleClassLoader.loadClass(ModuleClassLoader.java:132) ~[securejarhandler-1.0.3.jar:?] {}
at java.lang.ClassLoader.loadClass(ClassLoader.java:520) ~[?:?] {}
at com.sammy.malum.MalumMod.(MalumMod.java:55) ~[malum-1.18.2-1.4.4.3.jar%23109!/:1.18.2-1.4.4.3] {re:classloading}
... 14 more
Caused by: java.lang.ClassNotFoundException: team.lodestar.lodestone.systems.rendering.particle.screen.emitter.ItemParticleEmitter
at jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:641) ~[?:?] {}
at java.lang.ClassLoader.loadClass(ClassLoader.java:520) ~[?:?] {}
at cpw.mods.cl.ModuleClassLoader.loadClass(ModuleClassLoader.java:134) ~[securejarhandler-1.0.3.jar:?] {}
at java.lang.ClassLoader.loadClass(ClassLoader.java:520) ~[?:?] {}
at cpw.mods.cl.ModuleClassLoader.loadClass(ModuleClassLoader.java:134) ~[securejarhandler-1.0.3.jar:?] {}
at java.lang.ClassLoader.loadClass(ClassLoader.java:520) ~[?:?] {}
at java.lang.ClassLoader.defineClass1(Native Method) ~[?:?] {}
at java.lang.ClassLoader.defineClass(ClassLoader.java:1012) ~[?:?] {}
at cpw.mods.cl.ModuleClassLoader.readerToClass(ModuleClassLoader.java:116) ~[securejarhandler-1.0.3.jar:?] {}
at cpw.mods.cl.ModuleClassLoader.lambda$findClass$16(ModuleClassLoader.java:216) ~[securejarhandler-1.0.3.jar:?] {}
at cpw.mods.cl.ModuleClassLoader.loadFromModule(ModuleClassLoader.java:226) ~[securejarhandler-1.0.3.jar:?] {}
at cpw.mods.cl.ModuleClassLoader.findClass(ModuleClassLoader.java:216) ~[securejarhandler-1.0.3.jar:?] {}
at cpw.mods.cl.ModuleClassLoader.loadClass(ModuleClassLoader.java:132) ~[securejarhandler-1.0.3.jar:?] {}
at java.lang.ClassLoader.loadClass(ClassLoader.java:520) ~[?:?] {}
at com.sammy.malum.MalumMod.(MalumMod.java:55) ~[malum-1.18.2-1.4.4.3.jar%23109!/:1.18.2-1.4.4.3] {re:classloading}
... 14 more

malum 1.3.7 with ortus have loaded successfully

It was a problem with them using lodestone 1.4 rather than 1.3 alongside malum. Malum 1.5 will no longer complain about latest lodestone