Hello! We are aware of an issue in 24.05 that is a result of: https://bugs.koha-community.org/bugzilla3/show_bug.cgi?id=37892

This bug manifests in three ways:

1. Prevents checkins from the affected patrons ("The item has not been checked in due to a configuration issue in your system")
2. Prevents checkouts to the affected patrons (500 error)
3. Affected patrons are prevented from logging into the OPAC

The current workaround for this issue is to:

1. Go to your patron categories in Administration > Patron Categories
2. Take note of the current configuration of patron categories, particularly who can be guarantees
3. In each category, change the "can be guarantee" setting to "no"

This will preserve your current guarantor/guarantee relationships, but will prevent you from creating new ones. Once the patch for the bug arrives, you will be able to restore your original settings.

Our developers are aware of this issue and are working on a solution.

The community Aspen LiDA app will be undergoing a short period of maintenance that will impact access during ByWater's regularly scheduled maintenance window on the evening of Tuesday, October 8 after 9 PM CT. Users will be unable to use LiDA for approximately one hour while the maintenance is happening, and they may experience white screen and need to force close the app. Branded LiDA apps will not be affected.