The node was not disqualified but suspended. There are many threads here on the forum about how to look for reasons of suspension and fix the underlying cause. Once that has been done, the node will likely quickly recover.
Thanks for the very fast response and offered help!
This problem with suspension on eu1 disappeared mysteriously as it appeared!
Now it is OK again.
Maybe the problem is at satellite side or somewhere between.
I have a similar problem. I got an email with the message that says: " Your Storage Node on the us-central-1 Satellite was suspended because it produced errors too often during audits".
However the node works perfectly all the logs are clean from the last 3 months, the file system has no error, the dashboard does not report any suspension. The node was automatically updated 4 days ago to version 1.66.1.
I believe there is a malfunction in the monitoring/alerting system on STORJ side.