[17:52:59 INFO  SMAPI] Loaded mod: Stardew Keys by Krutonium, v1.0 | Adds support for Logitech Keyboard LED's to Stardew Valley
[17:52:59 INFO  Stardew Keys] Loading...
[17:52:59 ERROR SMAPI] Couldn't load mod for manifest 'E:\Steam\steamapps\common\Stardew Valley\Mods\StardewKeys\manifest.json': an error occurred while loading the target DLL.
System.DllNotFoundException: Unable to load DLL 'LogitechLedEnginesWrapper ': The specified module could not be found. (Exception from HRESULT: 0x8007007E)
   at LedCSharp.LogitechGSDK.LogiLedInit()
   at StardewKeys.ModEntry.Entry(IModHelper helper)
   at StardewModdingAPI.Program.LoadMods() in D:\source\SMAPI\src\StardewModdingAPI\Program.cs:line 459

The DLL is of course, not a valid SMAPI mod in the first place. Any way to tell SMAPI to ignore it/register it as a dependency of my mod?

SMAPI preprocesses all assemblies in the mod directory to support crossplatform compatibility. For most imported assemblies that should consist of checking whether it references Stardew Valley or XNA/MonoGame, and if not just caching the fact that it doesn't.

It looks like that isn't happening properly here. Can you attach a zip containing the mod directory (the one with manifest.json and both DLLs)?

@PFCKrutonium I'll close this for now due to lack of response. Feel free to reopen if you can provide a mod that reproduces the issue.

stardew valley expansion.zip
this is giving me the same error, but i am on 1.6 since i havent updated my game in a while.

smapi 1.6 that is
stardew valley 1.1 just incase anyone is wondering

it was a bit different now that i check, so ill post my errror.

[18:35:53 ERROR SMAPI] Couldn't load mod for manifest 'C:\GOG Games\Stardew Valley\Mods\StardewValleyExpansion\manifest.json': manifest doesn't specify an entry DLL.