Tar upload error

Hello,
I am getting an error when trying to upload a tar file. The funny thing is, one gem worked. I deleted it, tried adding same game and received this error. Happens with a lll tar file uploaded games. Any thoughts? Using 3.8.7.

Thanks in advance.

[Hippy]

U may be uploading the tar files in the wrong format . Check your client to see what it's using for .tar files