I'm sorry, this is the worst, least detailed "bug report" ever, but i'm hopeful with the error message, that will be sufficient to track down the potential issue(s). Steps to reproduce:
- Log in, navigate to Pack Blitz
- Open, Reroll, et cetera
- Click the green "save" button
- Name your Pack Title (Optional)
- Failwhale
Here's how the full results appear on my end, tried from multiple different (both Chromium based) web browsers -- the way the "Save Pack" menu is being drawn seems a little off to me:
Hope this is the correct location for bug reports. Please tag the appropriate people, i don't want to just start randomly blowing folks up. Thank you kindly, team.