I upload my modpack on different websites and no matter what it just gives me that error message. Once I uploaded it to filebin.net and it worked, but now its not letting anyone install it and when I went back to put in THE SAME LINK it gives me the error message. Here's the ZIP in case you think that might be the issue: https://filebin.net/52jfp337hk2bnd1i/THISServer.zip?t=d7lylccf.
If you can give me an answer as to why this is happening I'd really appreciate it. Thanks!