I have put together a few mods previously without issue, but I put together a simple infrastructure mod and when I try to build it I get an error saying: "Invalid data when building asset bundle".

The full error in the console says this:

DirectoryNotFoundException: Could not find a part of the path "C:\Users\Owner\Documents\Humankind\Community\Baka's Infrastructure Balancing\Assets\AssetBundles\StandaloneWindows64\Baka's Infrastructure Balancing.a2927df8aa9c48b5a35313d3e3c83358.0.1\baka's infrastructure balancing.a2927df8aa9c48b5a35313d3e3c83358.0.1.assetbundle.txt"

System.IO.FileStream..ctor (System.String path, System.IO.FileMode mode, System.IO.FileAccess access, System.IO.FileShare share, System.Int32 bufferSize, System.Boolean anonymous, System.IO.FileOptions options) (at <feaaa6313e32495d9f259b175aa6b597>:0)

System.IO.FileStream..ctor (System.String path, System.IO.FileMode mode, System.IO.FileAccess access, System.IO.FileShare share, System.Int32 bufferSize, System.IO.FileOptions options) (at <feaaa6313e32495d9f259b175aa6b597>:0)

(wrapper remoting-invoke-with-check) System.IO.FileStream..ctor(string,System.IO.FileMode,System.IO.FileAccess,System.IO.FileShare,int,System.IO.FileOptions)

System.IO.StreamWriter..ctor (System.String path, System.Boolean append, System.Text.Encoding encoding, System.Int32 

bufferSize) (at <feaaa6313e32495d9f259b175aa6b597>:0)

System.IO.StreamWriter..ctor (System.String path) (at <feaaa6313e32495d9f259b175aa6b597>:0)

(wrapper remoting-invoke-with-check) System.IO.StreamWriter..ctor(string)

System.IO.File.WriteAllText (System.String path, System.String contents) (at <feaaa6313e32495d9f259b175aa6b597>:0)

Amplitude.Framework.Editor.Builds.AssetBundleBuildSettings.WriteRevisionFiles (UnityEditor.BuildTarget buildTarget, System.String outputDirectoryPath, System.Boolean isPatch) (at <b6bdfd22e4244b26acb5bc47877e9a2e>:0)

Amplitude.Framework.Editor.Builds.AssetBundleBuildSettings.Build (UnityEditor.BuildTarget buildTarget, System.Boolean patchAssetBundle, System.Boolean dryRun, System.Collections.Generic.List`1[Amplitude.Framework.Editor.Builds.AssetBundleBuildSettings+AssetEntry]& assets) (at <b6bdfd22e4244b26acb5bc47877e9a2e>:0)

Amplitude.Framework.Editor.Builds.AssetBundleBuildSettings.BuildFull (Amplitude.Framework.Editor.Builds.AssetBundleBuildOptions buildOptions) (at <b6bdfd22e4244b26acb5bc47877e9a2e>:0)

Amplitude.Framework.Editor.Builds.AssetBundleBuildSettings.BuildFull (Amplitude.Framework.Editor.Builds.AssetBundleBuildOptions buildOptions) (at <b6bdfd22e4244b26acb5bc47877e9a2e>:0)

Amplitude.Mercury.Production.Modification.ModuleEditor.TryBuildDatabasePlugin (Amplitude.Framework.Runtime.RuntimeModule runtimeModule, UnityEditor.BuildTarget buildTarget, System.String& outputMessage) (at <121ede6be1f64ec59ec907de00d81a41>:0)

UnityEngine.Debug:LogException(Exception)

Amplitude.Mercury.Production.Modification.ModuleEditor:TryBuildDatabasePlugin(RuntimeModule, BuildTarget, String&)

Amplitude.Mercury.Production.Modification.ModuleEditor:TryBuildModification(RuntimeModule, BuildTarget, String&)

Amplitude.Mercury.Production.Modification.ModuleEditor:BuildModification(RuntimeModule, BuildTarget, Boolean)

Amplitude.Mercury.Production.Modification.<>c__DisplayClass106_0:<BuildModification>b__1()

UnityEditor.EditorApplication:Internal_CallDelayFunctions()

Has anyone come across this error and know how to get around it?

Thanks

I think I might have the same error. I've been unable to troubleshoot it.

I don't believe I tried this before, but it still didn't do the trick for me.  Did it solve it for you?

I dont know much about nothing, but i can suggeat you change the path of the project (cut it feom you mod proj folder and place it in something like G:/modshknd/ to shorten the path. After that open the peoject from unity hub at the new path and see if it works. I got thos error because of the very long path the mod creates when built, extending over the 254 character limit on unity.