Three days ago, I started creating a modpack. So I downloaded some mods, uploaded them on server and did the modpack creating stuff. When I was done, It was time to click the Install button (in the launcher). The Launcher downloaded all the .zip files to cache folder, as normal. But then something Strange happened... The launcher started extracting contents from jar packages to the root directory. I Really don't know what is happening. The log looks like the installation was successful. I tried to restart the launcher and reinstall the modpack several times but it did not helped. I hope someone could help me to fix this. https://www.technicpack.net/modpack/the-spideros-pack.1286371 root folder.zip EDIT: Only mods whose name contains (1) are correctly installed.