I confirmed and was unable to reproduce this on the latest version of the plugin, 2.2.6. I know there have been a number of updates since 220.127.116.11 including compatibility fixes with the more recent versions of WordPress so I suspect this is what you are running into. I would recommend updating to the latest version of the Sign-up Sheets plugin. If you still are noticing issues, please let me know and I can debug further.
Thank you for your reply. We believed 18.104.22.168 was the most recent version since there’s no notice of an available update on our plugins page. We’ve apparently lost our credentials from when the plugin was purchased, so updating through the WP admin is our only option I think. All we have is the license key, would this be helpful in recovering our account?
My apologies, I do believe there was a bug in that version that caused the updates to not appear in the admin. I sent out a manual email notice about a later update that fixed the issue so I apologize if you got missed! I will reach out to you directly regarding your license.