Could not dump ssh keys for user admin

Hi,
I want to clone a repository to my home directory so i can add a new file,
to do that i copy my id_rsa.pub to tuleap (siteAdmin->my_account-> add a new ssh-key).
After that i verifying the system_event , there is an error tuleap Could not dump ssh keys for user admin
Is that a problem of Docker version because i have the version is 1.12.4 ?