Importing SSH pubkey timeouts in 5.24

I tryed to import pubkey for SSH access to Mikrotik, but it timeouts even I have latest version 5.24 on RB750:

[ admin@mikrotik ] > /user ssh-keys import public-key-file=id_dsa.pub user=myuser
action timed out - try again, if error continues contact MikroTik support and send a supout file (13)

GUI import in user managment window by WinBox.exe does not work too. Any clue?

It works fine for me using a RB450 and v5.24.

I would reboot router, try again. If that doesn’t work, reset router to defaults, try again (if you have the option to do so). Aside from that, I would do what it says: “contact MikroTik support and send a supout file”