After having some troubles I installed a freshly OMV 4 to a brand new SSD.
OMV 4 is running on a HP ProLiant MicroServer gen8.
During installation the installation manager was able to start the ethernet interfaces... via DHCP they got IPv4.
But, after starting OMV 4 from SSD, I always get the error that "no ethernet interfaces are available". Having this error for some days now after installation.
Before having this trouble, OMV 4 was running on the same server without any problems.
Executed "ip link status" for getting more informations...
Hoping for a solution...