I am having the same issue. We have multiple domains pointed to a single server. Plain domains are working, IDN domains are not working. Issue seems to be also present in macOS version of swcutil. When trying to download AASA file with it, command fails with error. See attached code block. (MacOS Tahoe 26.3.1) user@user--MacBook-Air NewFolder% sudo swcutil dl -d xn--pckua2a7gp15o89zb.com --verbose SWCErrorDomain 8 { Domain: "<_SWCDomain 0x102b51540> 求人ボックス.com", Line: "532", Function: "-[SWCDownloader(Private) _downloadAASAFileForDomain:applicationIdentifier:downloadRoute:discretionary:completionHandlers:]_block_invoke" }