Just won't start on server for 1.20.1

Not sure what is wrong with it not working on this type of server. It has Complete Config and also has Fabric API. Here's the whole error code below
[16:24:34] [main/ERROR]: Failed to start the minecraft server java.lang.RuntimeException: Could not execute entrypoint stage 'main' due to errors, provided by 'customportals'! at net.fabricmc.loader.impl.FabricLoaderImpl.lambda$invokeEntrypoints$2(FabricLoaderImpl.java:388) ~[fabric-loader-0.15.11.jar:?] at net.fabricmc.loader.impl.util.ExceptionUtil.gatherExceptions(ExceptionUtil.java:33) ~[fabric-loader-0.15.11.jar:?] at net.fabricmc.loader.impl.FabricLoaderImpl.invokeEntrypoints(FabricLoaderImpl.java:386) ~[fabric-loader-0.15.11.jar:?] at net.fabricmc.loader.impl.game.minecraft.Hooks.startServer(Hooks.java:63) ~[fabric-loader-0.15.11.jar:?] at net.minecraft.server.Main.main(Main.java:112) ~[server-intermediary.jar:?] at net.fabricmc.loader.impl.game.minecraft.MinecraftGameProvider.launch(MinecraftGameProvider.java:470) ~[fabric-loader-0.15.11.jar:?] at net.fabricmc.loader.impl.launch.knot.Knot.launch(Knot.java:74) ~[fabric-loader-0.15.11.jar:?] at net.fabricmc.loader.impl.launch.knot.KnotServer.main(KnotServer.java:23) ~[fabric-loader-0.15.11.jar:?] at net.fabricmc.loader.impl.launch.server.FabricServerLauncher.main(FabricServerLauncher.java:69) ~[fabric-loader-0.15.11.jar:?] at net.fabricmc.installer.ServerLauncher.main(ServerLauncher.java:69) ~[fabric-server-mc.1.20.1-loader.0.15.11-launcher.1.0.1.jar:1.0.1] Caused by: java.lang.NoSuchFieldError: Class me.lortseam.completeconfig.data.BooleanEntry does not have member field 'boolean checkbox' at me.lortseam.completeconfig.data.BooleanEntry.<init>(BooleanEntry.java:25) ~[completeconfig-base-2.5.0-cd5950f26b406f27.jar:?] at me.lortseam.completeconfig.data.Entry.create(Entry.java:42) ~[completeconfig-base-2.5.0-cd5950f26b406f27.jar:?] at me.lortseam.completeconfig.data.EntrySet.lambda$resolve$1(EntrySet.java:31) ~[completeconfig-base-2.5.0-cd5950f26b406f27.jar:?] at java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:212) ~[?:?] at java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:194) ~[?:?] at java.util.Spliterators$ArraySpliterator.forEachRemaining(Spliterators.java:1024) ~[?:?] at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:556) ~[?:?] at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:546) ~[?:?] at java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:151) ~[?:?] at java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:174) ~[?:?] at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:265) ~[?:?] at java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:611) ~[?:?] at me.lortseam.completeconfig.data.EntrySet.resolve(EntrySet.java:32) ~[completeconfig-base-2.5.0-cd5950f26b406f27.jar:?] at me.lortseam.completeconfig.data.Parent.resolveContainer(Parent.java:58) ~[completeconfig-base-2.5.0-cd5950f26b406f27.jar:?] at me.lortseam.completeconfig.data.ClusterSet.resolve(ClusterSet.java:13) ~[completeconfig-base-2.5.0-cd5950f26b406f27.jar:?] at me.lortseam.completeconfig.data.Parent.resolve(Parent.java:108) ~[completeconfig-base-2.5.0-cd5950f26b406f27.jar:?] at me.lortseam.completeconfig.data.Parent.lambda$resolveContainer$6(Parent.java:97) ~[completeconfig-base-2.5.0-cd5950f26b406f27.jar:?] at java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:184) ~[?:?] at java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:212) ~[?:?] at java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:194) ~[?:?] at java.util.Spliterators$ArraySpliterator.forEachRemaining(Spliterators.java:1024) ~[?:?] at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:556) ~[?:?] at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:546) ~[?:?] at java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:151) ~[?:?] at java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:174) ~[?:?] at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:265) ~[?:?] at java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:611) ~[?:?] at me.lortseam.completeconfig.data.Parent.resolveContainer(Parent.java:97) ~[completeconfig-base-2.5.0-cd5950f26b406f27.jar:?] at me.lortseam.completeconfig.data.Parent.resolve(Parent.java:110) ~[completeconfig-base-2.5.0-cd5950f26b406f27.jar:?] at me.lortseam.completeconfig.data.Config.lambda$new$0(Config.java:51) ~[completeconfig-base-2.5.0-cd5950f26b406f27.jar:?] at me.lortseam.completeconfig.data.Config.deserialize(Config.java:94) ~[completeconfig-base-2.5.0-cd5950f26b406f27.jar:?] at me.lortseam.completeconfig.data.Config.load(Config.java:121) ~[completeconfig-base-2.5.0-cd5950f26b406f27.jar:?] at dev.custom.portals.CustomPortals.onInitialize(CustomPortals.java:48) ~[custom-portals-3.2.2-1.20.1.jar:?] at net.fabricmc.loader.impl.FabricLoaderImpl.invokeEntrypoints(FabricLoaderImpl.java:384) ~[fabric-loader-0.15.11.jar:?] ... 7 more

Nevermind found what I needed to do. What I just learned is that I need to use the 1.20.4 version for the server.