Docker ce not running in RHEL 7.6 any more

Sudenly my docker ce installation on RHEL 7.6 stopped working. The administrative commands like ‘run’ or ‘build’ hang without any error in the message log.
Other commands like ps, image, etc work fine.
Could this happen because of a OS recent update ?
I already tryed reinstalling Docker too.
please help!
thanks in advance

system details

Server Version: 18.09.2
Storage Driver: overlay2
Backing Filesystem: extfs
Supports d_type: true
Native Overlay Diff: true
Logging Driver: json-file
Cgroup Driver: cgroupfs
Volume: local
Network: bridge host macvlan null overlay
Log: awslogs fluentd gcplogs gelf journald json-file local logentries splunk syslog
Swarm: inactive
Runtimes: runc
Default Runtime: runc
Init Binary: docker-init
containerd version: 9754871865f7fe2f4e74d43e2fc7ccd237edcbce
runc version: 09c8266bf2fcf9519a651b04ae54c967b9ab86ec
init version: fec3683
Security Options:
Profile: default
Kernel Version: 3.10.0-957.5.1.el7.x86_64
Operating System: Red Hat Enterprise Linux Workstation 7.6 (Maipo)
OSType: linux
Architecture: x86_64

Is this Docker CE?

RHEL is now only supported by Docker EE. Docker CE is not supported on RHEL anymore.

$ curl --silent | sh
# Executing docker install script, commit: 40b1b76

  WARNING: rhel is now only supported by Docker EE
           Check for information on Docker EE