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Error loading class: shadows/placebo/json/DynamicRegistryObject (java.lang.ClassNotFoundException: shadows.placebo.json.DynamicR


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I keep getting the following error when I try to start up minecraft.


Error loading class: shadows/placebo/json/DynamicRegistryObject (java.lang.ClassNotFoundException: shadows.placebo.json.DynamicR

 I also put the debug.log here:


and the crash report here:


[21may2023 18:23:18.639] [main/INFO] [cpw.mods.modlauncher.Launcher/MODLAUNCHER]: ModLauncher running: args [--username, Sttratosphere, --version, 1.18.2-forge-40.2.0, --gameDir, C:\Users\FZT-K\AppData\Roaming\.minecraft, --assetsDir, C:\Users\FZT-K\AppData\Roaming\.minecraft\assets, --assetIndex, 1.18, --uuid, 2b356299c64f3a149137202abf0c5fa7, --accessToken, ????????, --clientId, 0, --xuid, 0, --userType, mojang, --versionType, release, --launchTarget, forgeclient, --fml.forgeVersion, 40.2.0, --fml.mcVersion, 1.18.2, --fml.forgeGroup, net.minecraftforge, --fml.mcpVersion, 20220404.173914]
[21may2023 18:23:18.645] [main/INFO] [cpw.mods.modlauncher.Launcher/MODLAUNCHER]: ModLauncher 9.1.3+9.1.3+main.9b69c82a starting: java version 17.0.1 by Microsoft
[21may2023 18:23:18.893] [main/INFO] [mixin/]: SpongePowered MIXIN Subsystem Version=0.8.5 Source=union:/C:/Users/FZT-K/AppData/Roaming/.minecraft/libraries/org/spongepowered/mixin/0.8.5/mixin-0.8.5.jar%2314!/ Service=ModLauncher Env=CLIENT
[21may2023 18:23:20.274] [main/WARN] [net.minecraftforge.fml.loading.moddiscovery.ModFileParser/LOADING]: Mod file C:\Users\FZT-K\AppData\Roaming\.minecraft\libraries\net\minecraftforge\fmlcore\1.18.2-40.2.0\fmlcore-1.18.2-40.2.0.jar is missing mods.toml file
[21may2023 18:23:20.280] [main/WARN] [net.minecraftforge.fml.loading.moddiscovery.ModFileParser/LOADING]: Mod file C:\Users\FZT-K\AppData\Roaming\.minecraft\libraries\net\minecraftforge\javafmllanguage\1.18.2-40.2.0\javafmllanguage-1.18.2-40.2.0.jar is missing mods.toml file
[21may2023 18:23:20.287] [main/WARN] [net.minecraftforge.fml.loading.moddiscovery.ModFileParser/LOADING]: Mod file C:\Users\FZT-K\AppData\Roaming\.minecraft\libraries\net\minecraftforge\lowcodelanguage\1.18.2-40.2.0\lowcodelanguage-1.18.2-40.2.0.jar is missing mods.toml file
[21may2023 18:23:20.293] [main/WARN] [net.minecraftforge.fml.loading.moddiscovery.ModFileParser/LOADING]: Mod file C:\Users\FZT-K\AppData\Roaming\.minecraft\libraries\net\minecraftforge\mclanguage\1.18.2-40.2.0\mclanguage-1.18.2-40.2.0.jar is missing mods.toml file
[21may2023 18:23:20.460] [main/INFO] [net.minecraftforge.fml.loading.moddiscovery.JarInJarDependencyLocator/]: Found 2 dependencies adding them to mods collection
[21may2023 18:23:20.590] [main/ERROR] [net.minecraftforge.fml.loading.ModSorter/LOADING]: Missing or unsupported mandatory dependencies:
    Mod ID: 'placebo', Requested by: 'apotheosis', Expected range: '[6.6.6,)', Actual version: '[MISSING]'
[21may2023 18:23:24.214] [main/INFO] [mixin/]: Compatibility level set to JAVA_17
[21may2023 18:23:24.662] [main/INFO] [mixin/]: Successfully loaded Mixin Connector [de.maxhenkel.camera.MixinConnector]
[21may2023 18:23:24.666] [main/INFO] [cpw.mods.modlauncher.LaunchServiceHandler/MODLAUNCHER]: Launching target 'forgeclient' with arguments [--version, 1.18.2-forge-40.2.0, --gameDir, C:\Users\FZT-K\AppData\Roaming\.minecraft, --assetsDir, C:\Users\FZT-K\AppData\Roaming\.minecraft\assets, --uuid, 2b356299c64f3a149137202abf0c5fa7, --username, Sttratosphere, --assetIndex, 1.18, --accessToken, ????????, --clientId, 0, --xuid, 0, --userType, mojang, --versionType, release]
[21may2023 18:23:24.800] [main/WARN] [mixin/]: Reference map 'morevillagers-forge-forge-refmap.json' for morevillagers.mixins.json could not be read. If this is a development environment you can ignore this message
[21may2023 18:23:25.005] [main/WARN] [mixin/]: Reference map 'idas.refmap.json' for idas.mixins.json could not be read. If this is a development environment you can ignore this message
[21may2023 18:23:27.163] [main/INFO] [mixin/]: BeforeConstant is searching for constants in method with descriptor (Lnet/minecraft/network/chat/Component;Z)V
[21may2023 18:23:27.163] [main/INFO] [mixin/]:   BeforeConstant found INTEGER constant: value = 60, intValue = null
[21may2023 18:23:27.164] [main/INFO] [mixin/]:     BeforeConstant found a matching constant TYPE at ordinal 0
[21may2023 18:23:27.164] [main/INFO] [mixin/]:       BeforeConstant found IntInsn 60
[21may2023 18:23:27.953] [pool-5-thread-1/WARN] [mixin/]: Error loading class: shadows/placebo/json/DynamicRegistryObject (java.lang.ClassNotFoundException: shadows.placebo.json.DynamicRegistryObject)


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[21may2023 18:23:20.590] [main/ERROR] [net.minecraftforge.fml.loading.ModSorter/LOADING]: Missing or unsupported mandatory dependencies:
    Mod ID: 'placebo', Requested by: 'apotheosis', Expected range: '[6.6.6,)', Actual version: '[MISSING]'


Edited by warjort


If you don't post your logs/debug.log we can't help you. For curseforge you need to enable the forge debug.log in its minecraft settings. You should also post your crash report if you have one.

If there is no error in the log file and you don't have a crash report then post the launcher_log.txt from the minecraft folder. Again for curseforge this will be in your curseforge/minecraft/Install

Large files should be posted to a file sharing site like https://gist.github.com  You should also read the support forum sticky post.

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