Hello, whenever I try to launch the Forge 1.19.4 (45.0.43) server it crashes immediately. I have no issues running the Forge 1.19.3 (44.1.23) server on my machine. I also have no issues running the client of either version on my machine.
This install has no mods, only Forge. I have Java JRE 8 update 861 and Java JDK 20 installed.

If there's any further info I could provide to assist fixing this issue, please ask and I shall do my best to provide it.
Any help is greatly appreciated.

Below is the console log (with my name censored):

2023-04-12 12:44:25,228 main WARN Advanced terminal features are not available in this environment
[12:44:25] [main/INFO] [cp.mo.mo.Launcher/MODLAUNCHER]: ModLauncher running: args [--launchTarget, forgeserver, --fml.forgeVersion, 45.0.43, --fml.mcVersion, 1.19.4, --fml.forgeGroup, net.minecraftforge, --fml.mcpVersion, 20230314.122934]
[12:44:25] [main/INFO] [cp.mo.mo.Launcher/MODLAUNCHER]: ModLauncher 10.0.8+10.0.8+main.0ef7e830 starting: java version 20 by Oracle Corporation; OS Windows 10 arch amd64 version 10.0
[12:44:25] [main/INFO] [mixin/]: SpongePowered MIXIN Subsystem Version=0.8.5 Source=union:/C:/Users/NAME/Desktop/TEST%20SERVER/libraries/org/spongepowered/mixin/0.8.5/mixin-0.8.5.jar%2363!/ Service=ModLauncher Env=SERVER
[12:44:25] [main/WARN] [ne.mi.fm.lo.mo.ModFileParser/LOADING]: Mod file C:\Users\NAME\Desktop\TEST SERVER\libraries\net\minecraftforge\fmlcore\1.19.4-45.0.43\fmlcore-1.19.4-45.0.43.jar is missing mods.toml file
[12:44:25] [main/WARN] [ne.mi.fm.lo.mo.ModFileParser/LOADING]: Mod file C:\Users\NAME\Desktop\TEST SERVER\libraries\net\minecraftforge\javafmllanguage\1.19.4-45.0.43\javafmllanguage-1.19.4-45.0.43.jar is missing mods.toml file
[12:44:25] [main/WARN] [ne.mi.fm.lo.mo.ModFileParser/LOADING]: Mod file C:\Users\NAME\Desktop\TEST SERVER\libraries\net\minecraftforge\lowcodelanguage\1.19.4-45.0.43\lowcodelanguage-1.19.4-45.0.43.jar is missing mods.toml file
[12:44:25] [main/WARN] [ne.mi.fm.lo.mo.ModFileParser/LOADING]: Mod file C:\Users\NAME\Desktop\TEST SERVER\libraries\net\minecraftforge\mclanguage\1.19.4-45.0.43\mclanguage-1.19.4-45.0.43.jar is missing mods.toml file
[12:44:25] [main/INFO] [ne.mi.fm.lo.mo.JarInJarDependencyLocator/]: No dependencies to load found. Skipping!
[12:44:27] [main/INFO] [cp.mo.mo.LaunchServiceHandler/MODLAUNCHER]: Launching target 'forgeserver' with arguments []
Exception in thread "main" java.lang.RuntimeException: java.lang.reflect.InvocationTargetException
        at MC-BOOTSTRAP/[email protected]/cpw.mods.modlauncher.LaunchServiceHandlerDecorator.launch(LaunchServiceHandlerDecorator.java:32)
        at MC-BOOTSTRAP/[email protected]/cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:53)
        at MC-BOOTSTRAP/[email protected]/cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:71)
        at MC-BOOTSTRAP/[email protected]/cpw.mods.modlauncher.Launcher.run(Launcher.java:106)
        at MC-BOOTSTRAP/[email protected]/cpw.mods.modlauncher.Launcher.main(Launcher.java:77)
        at MC-BOOTSTRAP/[email protected]/cpw.mods.modlauncher.BootstrapLaunchConsumer.accept(BootstrapLaunchConsumer.java:26)
        at MC-BOOTSTRAP/[email protected]/cpw.mods.modlauncher.BootstrapLaunchConsumer.accept(BootstrapLaunchConsumer.java:23)
        at [email protected]/cpw.mods.bootstraplauncher.BootstrapLauncher.main(BootstrapLauncher.java:141)
Caused by: java.lang.reflect.InvocationTargetException
        at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:119)
        at java.base/java.lang.reflect.Method.invoke(Method.java:578)
        at MC-BOOTSTRAP/[email protected]/net.minecraftforge.fml.loading.targets.CommonServerLaunchHandler.lambda$launchService$0(CommonServerLaunchHandler.java:29)
        at MC-BOOTSTRAP/[email protected]/cpw.mods.modlauncher.LaunchServiceHandlerDecorator.launch(LaunchServiceHandlerDecorator.java:30)
        ... 7 more
Caused by: java.lang.BootstrapMethodError: java.lang.IllegalArgumentException: Unsupported class file major version 64
        at TRANSFORMER/[email protected]/net.minecraft.world.level.levelgen.structure.pieces.StructurePieceType.<clinit>(StructurePieceType.java:79)
        at TRANSFORMER/[email protected]/net.minecraft.core.registries.BuiltInRegistries.m_257693_(BuiltInRegistries.java:339)
        at TRANSFORMER/[email protected]/net.minecraft.core.registries.BuiltInRegistries.m_258029_(BuiltInRegistries.java:441)
        at TRANSFORMER/[email protected]/net.minecraft.core.registries.BuiltInRegistries.m_258037_(BuiltInRegistries.java:455)
        at java.base/java.util.LinkedHashMap.forEach(LinkedHashMap.java:729)
        at TRANSFORMER/[email protected]/net.minecraft.core.registries.BuiltInRegistries.m_257453_(BuiltInRegistries.java:454)
        at TRANSFORMER/[email protected]/net.minecraft.core.registries.BuiltInRegistries.m_257498_(BuiltInRegistries.java:448)
        at TRANSFORMER/[email protected]/net.minecraft.server.Bootstrap.m_135870_(Bootstrap.java:49)
        at TRANSFORMER/[email protected]/net.minecraft.server.Main.main(Main.java:121)
        at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:104)
        ... 10 more
Caused by: java.lang.IllegalArgumentException: Unsupported class file major version 64
        at [email protected]/org.objectweb.asm.ClassReader.<init>(ClassReader.java:199)
        at [email protected]/org.objectweb.asm.ClassReader.<init>(ClassReader.java:180)
        at [email protected]/org.objectweb.asm.ClassReader.<init>(ClassReader.java:166)
        at MC-BOOTSTRAP/[email protected]/cpw.mods.modlauncher.ClassTransformer.transform(ClassTransformer.java:75)
        at MC-BOOTSTRAP/[email protected]/cpw.mods.modlauncher.TransformingClassLoader.maybeTransformClassBytes(TransformingClassLoader.java:50)
        at cpw.mods.securejarhandler/cpw.mods.cl.ModuleClassLoader.getMaybeTransformedClassBytes(ModuleClassLoader.java:250)
        at MC-BOOTSTRAP/[email protected]/cpw.mods.modlauncher.TransformingClassLoader.buildTransformedClassNodeFor(TransformingClassLoader.java:58)
        at MC-BOOTSTRAP/[email protected]/cpw.mods.modlauncher.TransformerClassWriter.computeHierarchyFromFile(TransformerClassWriter.java:149)
        at MC-BOOTSTRAP/[email protected]/cpw.mods.modlauncher.TransformerClassWriter.computeHierarchy(TransformerClassWriter.java:112)
        at MC-BOOTSTRAP/[email protected]/cpw.mods.modlauncher.TransformerClassWriter.getSupers(TransformerClassWriter.java:83)
        at MC-BOOTSTRAP/[email protected]/cpw.mods.modlauncher.TransformerClassWriter.getCommonSuperClass(TransformerClassWriter.java:63)
        at [email protected]/org.objectweb.asm.SymbolTable.addMergedType(SymbolTable.java:1202)
        at [email protected]/org.objectweb.asm.Frame.merge(Frame.java:1299)
        at [email protected]/org.objectweb.asm.Frame.merge(Frame.java:1197)
        at [email protected]/org.objectweb.asm.MethodWriter.computeAllFrames(MethodWriter.java:1611)
        at [email protected]/org.objectweb.asm.MethodWriter.visitMaxs(MethodWriter.java:1547)
        at [email protected]/org.objectweb.asm.tree.MethodNode.accept(MethodNode.java:767)
        at [email protected]/org.objectweb.asm.tree.MethodNode.accept(MethodNode.java:647)
        at [email protected]/org.objectweb.asm.tree.ClassNode.accept(ClassNode.java:451)
        at MC-BOOTSTRAP/[email protected]/cpw.mods.modlauncher.ClassTransformer.transform(ClassTransformer.java:133)
        at MC-BOOTSTRAP/[email protected]/cpw.mods.modlauncher.TransformingClassLoader.maybeTransformClassBytes(TransformingClassLoader.java:50)
        at cpw.mods.securejarhandler/cpw.mods.cl.ModuleClassLoader.readerToClass(ModuleClassLoader.java:113)
        at cpw.mods.securejarhandler/cpw.mods.cl.ModuleClassLoader.lambda$findClass$15(ModuleClassLoader.java:219)
        at cpw.mods.securejarhandler/cpw.mods.cl.ModuleClassLoader.loadFromModule(ModuleClassLoader.java:229)
        at cpw.mods.securejarhandler/cpw.mods.cl.ModuleClassLoader.findClass(ModuleClassLoader.java:219)
        at cpw.mods.securejarhandler/cpw.mods.cl.ModuleClassLoader.loadClass(ModuleClassLoader.java:135)
        at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:521)
        ... 20 more

Use java 17

Thank you! Uninstalling Java 20 and installing Java 17 worked. For anyone in my specific position who finds this in the future, make sure you don't have both installed at the same time - ONLY Java 17.