carcipechi

you have Gregtech in your modpack, did you force 'folder change' and save the modpack outside the .technic folder? modpacks having Gregtech should be downloaded to any folder OUTSIDE the .technic folder

be aware when creating your modpack.jar, do not call it I could not resist :)

Just a quick tip to see if your modpack link will work in the Platform: copy the link in your browser address bar and press enter, - if the download starts immediately, the link is correct - if it shows a page with a download button, the link is wrong. To correct the wrong link, right click on the download button and 'copy link', paste it in the address bar and try again. EDIT: please be aware that a nice Guide by IceWolf has been posted on the Platform Homepage click to see it NAO!