When I try to Check in an item with the top bar Check in functionality I get this error: An error has occurred! Error 500 In Koha this typically means that the Koha team is working on new features Wait while system maintenance is being done or email the Koha administrator. Use top menu bar to navigate to another part of Koha. In the koha-error log: http://paste.koha-community.org/57 Checking in from the patron's details page works fine. I just did today a database upgrade to 3.21.00.21, so not sure if that is the problem or something else. I'm trying to figure out this and will let you know.
Found the problem: This bug happens when you import biblio records from an older version of Koha and then you create an item without first manually editing the record (just clicking edit and then saving it is enough to get it working).
Ok. I found now a more specific reason why this bug happens: This bug happens when the biblio record which is being processed misses some info / or the info is invalid (see bug 14768 for more info). I suggest as a fix that we would add an alert / some info text which would tell what went wrong really. For example, "The biblio record you're trying to process is missing some info, please check the compatibility of the biblio record's data with your system."
The itemtype of the record is not defined in the itemtypes table, that's it?
(In reply to Jonathan Druart from comment #3) > The itemtype of the record is not defined in the itemtypes table, that's it? That is it. But I guess there could be some other info missing also.
So it's a configuration issue, not a bug.