When there is an umlaut or other diacritic in a item type or collection code, this tab cannot be selected on the library transfer limits page. To test: - Add a collection code with an umlaut or diacritic. Example: ÖÜÄ - Go to administration > library transfer limits - Verify that you cannot activate the tab of the umlaut collection I hope this is not a general issue with diacritics hiding somewhere. One might argue that you should not use any special characters in codes.