I've stumbled upon a weird issue that I haven't encountered or read about before. This is somewhat painful because you'll have to do it one file at a time. If this is the case, you'll need to select, right click, click Unblock, and click OK on every *.exe *.dll file in the Mod Organizer folder. If you see the Unblock button or checkbox, this means all of the executables in the Mod Organizer folder are blocked and Windows 10 or your antivirus software may be preventing the file from loading. If the file is here, right click Gamebryo.dll, select Properties, and look toward the bottom right of the Properties dialog for an Unblock button (Windows 7) or an Unblock checkbox (Windows 10). Unfortunately, some AntiVirus software cause more harm than good and aren't worth the trouble. Either Mod Organizer wasn't installed correctly or perhaps your AntiVirus software decided you don't need this file and deleted it for you without question or notification. If this file isn't here, something is off with your Mod Organizer installation. You should have 19 DLL files along with a data folder here and one of the files should be GamebryoBase.dll. The base path should be something like this: Open Windows Explorer and go into the NCC\GameModes folder in Mod Organizer.