If you get an error saying that there's an invalid swap when uploading your Late Swap lineups to the sites, it's most likely because your Entries file on SaberSim became out of sync with the lineups you actually had in play on the site. The easiest way to fix this is to redownload your Entries file from DraftKings or FanDuel, and upload that back to SaberSim. You can do that easily on the Edit Entries page on DraftKings by just selecting the sport, style and slate, and downloading your Entries file. And on the case of FanDuel, going to the Live tab and finding the CSV Edit button next to the slate that you want to edit.
Once you've got your new Entries file, in the Entries tab on SaberSim, just click the Upload New Entries button and upload your new file. It'll ask you to confirm that you want to overwrite, click yes. And now that your Entries file is back in sync on SaberSim, you should be able to proceed with the Late Swap build and have no issues. If you do this and you're still having issues with Late Swap, make sure that you're downloading the Entries file for the correct sport, style and slate on both sites, and that you're uploading it to the correct slate on SaberSim. And if you're still having issues after that, feel free to reach out to us at [email protected], and we'd be happy to help. If you're interested in learning more about the rest of the Late Swap or lineup building process on SaberSim, check out some of the other videos in our support documentation. In the meantime, thanks and good luck.