[Koha] Koha 19.05 Invalid data, cannot decode object (id=, format=marcxml, schema=MARC21)

Dear Colleagues, after update to the Version 19.05 I cant see any details in catalog. The detail script get the Software error. Searching is running without problems. cgi-bin/koha/catalogue/detail.pl?biblionumber=2&searchid=scs_1561546292007 Software error: Invalid data, cannot decode object (id=2, format=marcxml, schema=MARC21) All of the data in the catalog I have imported as MARC21. I have already tried to truncate the database and reimport the data. Any solutions? I think it is the same error: https://www.mail-archive.com/koha@lists.katipo.co.nz/msg24021.html Mit besten Grüßen, Eugen Bastron IT-Manager Deutsches Historisches Institut Moskau