Seahub won't restart

Hello,
while trying to restart seahub, my raspberry -server responses:
Stopping seahub …
Starting seahub at port 8000 …
[2021-05-13 12:49:03 +0000] [13531] [INFO] Starting gunicorn 20.0.4
[2021-05-13 12:49:03 +0000] [13531] [INFO] Listening at: http://0.0.0.0:8000 (13531)
[2021-05-13 12:49:03 +0000] [13531] [INFO] Using worker: sync
[2021-05-13 12:49:03 +0000] [13566] [INFO] Booting worker with pid: 13566
[2021-05-13 12:49:03 +0000] [13567] [INFO] Booting worker with pid: 13567
[2021-05-13 12:49:03 +0000] [13568] [INFO] Booting worker with pid: 13568

That’s all. But seahub is running.
I’m using Seafile Server 8.0.3 for Raspberry Pi
Anybody an idea?
Thank you :grinning:
Uli