使用TranporterApp上传应用的时候报这个错：
Cannot proceed with delivery: an existing transporter instance is currently uploading this package
Failed to obtain exclusive lock on token file. Please ensure the following file is not locked by another process: /Users/xxxxx/Library/Caches/com.apple.amp.itmstransporter/UploadTokens/xxxxxx-Pro.local_LU7VCDS84D_1578085847-1-1.0.3-1.itmsp.token
解决办法：直接进入到/Users/xxxxx/Library/Caches/com.apple.amp.itmstransporter/UploadTokens/目录删除下面的两个文件。删除后，再回到TransporterApp中点击交付即可。
