Can not clone self hosted Repository

I’ve installed gitlab-ee on an debian maschine.
All looks nice:

run: alertmanager: (pid 116697) 3942s; run: log: (pid 839) 68282s
run: gitaly: (pid 116785) 3934s; run: log: (pid 847) 68282s
run: gitlab-exporter: (pid 116707) 3941s; run: log: (pid 830) 68282s
run: gitlab-workhorse: (pid 116683) 3942s; run: log: (pid 833) 68282s
run: grafana: (pid 116710) 3941s; run: log: (pid 838) 68282s
run: logrotate: (pid 122726) 340s; run: log: (pid 841) 68282s
run: nginx: (pid 116718) 3940s; run: log: (pid 842) 68282s
run: node-exporter: (pid 116729) 3939s; run: log: (pid 834) 68282s
run: postgres-exporter: (pid 116735) 3939s; run: log: (pid 832) 68282s
run: postgresql: (pid 95979) 9319s; run: log: (pid 836) 68282s
run: prometheus: (pid 116743) 3939s; run: log: (pid 835) 68282s
run: puma: (pid 116745) 3938s; run: log: (pid 840) 68282s
run: redis: (pid 96025) 9315s; run: log: (pid 846) 68282s
run: redis-exporter: (pid 116755) 3938s; run: log: (pid 837) 68282s
run: sidekiq: (pid 116763) 3937s; run: log: (pid 845) 68282s

After that I created an test Project.

If I try to clone the Project from another debian server with ssh it doesn’t work. the necessary ssh keys are stored.

I tryed the following to get more informations:

GIT_SSH_COMMAND=“ssh -vvv” git clone git@host:development/clone-test.git

One of the log lines shows:
debug1: Authentication succeeded (publickey)
And that it’s right. ssh -T git@host works.

But in the further process, the log then shows this error message:

fatal: ‘development/clone-test.git’ does not appear to be a git repository

fatal: could not read from the remote repository.

Please make sure that you have the correct access rights
and the repository exists.

I didn’t understand whats the problem. Can anybody help me please?