I know this is way old, but it was likely DAI Mod Manager, I'm getting the same issue after needing to reinstall everything when my harddrive Windows boot files were corrupted. [12/21/2020 8:13 PM] Processing official patch. [12/21/2020 8:14 PM] Task failed. Error reported was: Object reference not set to an instance of an object. Update\Patch\Data\Win32\dlc1_creatures_o.toc is the file it dropped the error on for me, too. The version number that DAimod is showing me for the patch is 12, and I'm using the latest version of DaiMod and I've redownloaded all of my old mods to make sure they're all updated versions. EDIT: Fixed this rather quickly with a bit more searching. DAIToolsSuite Loader didn't update the Mod Manager like I thought it had (I'd used the same old version that was in my recovered mods folder like a dummy because I wasn't paying attention to what I had to do with the Suite Loader and didn't use it correctly), so I just re-downloaded the Suite Loader, updated Mod Manager, then did a forced rescan of the patch while merging, and all is well. Tossing this in here just in case someone like me that wasn't paying attention to the Mod Manager version number searching for the same error fix. I know the Suite Loader is currently abandoned, but it did the trick. For Patch 12, you NEED Mod Manager v0.59 at the very least, apparently.
