"Copy Item" doesn't work

[elflan]

Steps to reproduce

1. Select any item
2. Chose Copy Item

Expected behaviour

Tell us what should happen

Actual behaviour

Form appears to select de destination folder
when clicking "OK" Nothing happens

Server configuration

QNAP QTS 4.3.3

Web server:
Apache 2.2

Database:
5.5.51-MariaDB

PHP version:
5.6.29

Teampass version:
2.1.27

Updated from an older Teampass or fresh install:
Update from 2.1.26 to 2.1.27

Client configuration

Browser:
Chrome, Opera, Firefox

Operating system:
QTS 4.3.3

Logs

Web server error log

Insert your webserver log here

Firebug log (How to?)

Insert the Firebug log here

[{"error" : "case_not_managed"}, {"error_text" : "ERROR - case is not managed"}]

[reginfo]

The same problem in 2.1.27.2