[23:41:23] [main/INFO]: Loading tweak class name org.dimdev.riftloader.launch.RiftLoaderClientTweaker
[23:41:23] [main/INFO]: Using primary tweak class name org.dimdev.riftloader.launch.RiftLoaderClientTweaker
[23:41:23] [main/INFO]: Calling tweak class org.dimdev.riftloader.launch.RiftLoaderClientTweaker
[23:41:23] [main/INFO]: Searching mods on classpath
[23:41:23] [main/INFO]: Loaded mod 'rift'
[23:41:23] [main/INFO]: Searching for mods in C:\mods
[23:41:23] [main/INFO]: Loaded mod 'itemscroller'
[23:41:23] [main/INFO]: Loaded mod 'voxelmap'
[23:41:23] [main/INFO]: Loaded 4 mods
[23:41:23] [main/INFO]: Initializing mods
[23:41:23] [main/ERROR]: Unable to launch
java.lang.RuntimeException: java.lang.reflect.InvocationTargetException
at org.dimdev.riftloader.launch.RiftLoaderTweaker.injectIntoClassLoader(RiftLoaderTweaker.java:28) ~[rift-1.0.4-SNAPSHOT.jar:?]
at net.minecraft.launchwrapper.Launch.launch(Launch.java:115) [launchwrapper-1.12.jar:?]
at net.minecraft.launchwrapper.Launch.main(Launch.java:28) [launchwrapper-1.12.jar:?]
Caused by: java.lang.reflect.InvocationTargetException
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 org.dimdev.riftloader.launch.RiftLoaderTweaker.injectIntoClassLoader(RiftLoaderTweaker.java:26) ~[rift-1.0.4-SNAPSHOT.jar:?]
... 2 more
Caused by: java.lang.NoClassDefFoundError: fi/dy/masa/malilib/interfaces/IInitializationHandler
at java.lang.Class.forName0(Native Method) ~[?:1.8.0_51]
at java.lang.Class.forName(Class.java:348) ~[?:1.8.0_51]
at org.dimdev.riftloader.RiftLoader.loadListeners(RiftLoader.java:248) ~[rift-1.0.4-SNAPSHOT.jar:?]
at org.dimdev.riftloader.RiftLoader.getListeners(RiftLoader.java:233) ~[rift-1.0.4-SNAPSHOT.jar:?]
at org.dimdev.riftloader.RiftLoader.initMods(RiftLoader.java:188) ~[rift-1.0.4-SNAPSHOT.jar:?]
at org.dimdev.riftloader.RiftLoader.load(RiftLoader.java:54) ~[rift-1.0.4-SNAPSHOT.jar:?]
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 org.dimdev.riftloader.launch.RiftLoaderTweaker.injectIntoClassLoader(RiftLoaderTweaker.java:26) ~[rift-1.0.4-SNAPSHOT.jar:?]
... 2 more
Caused by: java.lang.ClassNotFoundException: fi.dy.masa.malilib.interfaces.IInitializationHandler
at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:191) ~[launchwrapper-1.12.jar:?]
at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[?:1.8.0_51]
at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[?:1.8.0_51]
at java.lang.Class.forName0(Native Method) ~[?:1.8.0_51]
at java.lang.Class.forName(Class.java:348) ~[?:1.8.0_51]
at org.dimdev.riftloader.RiftLoader.loadListeners(RiftLoader.java:248) ~[rift-1.0.4-SNAPSHOT.jar:?]
at org.dimdev.riftloader.RiftLoader.getListeners(RiftLoader.java:233) ~[rift-1.0.4-SNAPSHOT.jar:?]
at org.dimdev.riftloader.RiftLoader.initMods(RiftLoader.java:188) ~[rift-1.0.4-SNAPSHOT.jar:?]
at org.dimdev.riftloader.RiftLoader.load(RiftLoader.java:54) ~[rift-1.0.4-SNAPSHOT.jar:?]
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 org.dimdev.riftloader.launch.RiftLoaderTweaker.injectIntoClassLoader(RiftLoaderTweaker.java:26) ~[rift-1.0.4-SNAPSHOT.jar:?]
... 2 more
Caused by: java.lang.NullPointerException
at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:182) ~[launchwrapper-1.12.jar:?]
at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[?:1.8.0_51]
at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[?:1.8.0_51]
at java.lang.Class.forName0(Native Method) ~[?:1.8.0_51]
at java.lang.Class.forName(Class.java:348) ~[?:1.8.0_51]
at org.dimdev.riftloader.RiftLoader.loadListeners(RiftLoader.java:248) ~[rift-1.0.4-SNAPSHOT.jar:?]
at org.dimdev.riftloader.RiftLoader.getListeners(RiftLoader.java:233) ~[rift-1.0.4-SNAPSHOT.jar:?]
at org.dimdev.riftloader.RiftLoader.initMods(RiftLoader.java:188) ~[rift-1.0.4-SNAPSHOT.jar:?]
at org.dimdev.riftloader.RiftLoader.load(RiftLoader.java:54) ~[rift-1.0.4-SNAPSHOT.jar:?]
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 org.dimdev.riftloader.launch.RiftLoaderTweaker.injectIntoClassLoader(RiftLoaderTweaker.java:26) ~[rift-1.0.4-SNAPSHOT.jar:?]
... 2 more

Everything works fine without itemscroller-rift-1.13.2-0.14.2, but crashes when added.
any suggestions???

Out of curiosity what version of java are you running and what other mods beside itemscroller and voxelmap are you running.

Out of curiosity what version of java are you running and what other mods beside itemscroller and voxelmap are you running.

Java version: 8.0.1910.12 x64
Mods : itemscorller, voxelmap and optifine

You are missing the malilib library mod, which is required by the LiteLoader and Rift versions of Item Scroller.

Thank you @maruohon, added malilib and everything works fine now.

You are missing the malilib library mod, which is required by the LiteLoader and Rift versions of Item Scroller.