After some changes logs are not visible in Web-UI, but log-file in log-catalog in worker container is OK

Airflow 2.7.3, installed in Docker (Portainer) with containers (and with proxy), CeleryExecutor

Error

f2ad1c31c101
*** Could not read served logs: Server error ‘503 Service Unavailable’ for url
‘http://f2ad1c31c101:8793/log/dag_id=run_one_model_DAG/run_id=manual__2024-05-15T17:18:04.870528+00:00/task_id=one_model.model1_run/attempt=1.log’

worker_log_server_port = 8793 (in config, default)

Port 8793 was not in old version of docker-compose, but worked.

Where to find why 503?
Seems, all other modules in Airflow are working

Restart of Stack in Portainer not helped