The Kubernetes plugin fails to read the cluster configuration from the kubecfg yaml file provided as Jenkins secret through JCasC.

manage/configureClouds -> Kubernetes clud details -> test connection fails with

{{Error testing connection : com.fasterxml.jackson.dataformat.yaml.JacksonYAMLParseException: special characters are not allowed
at [Source: (StringReader); line: 1, column: 1]}}

Jenkins log is full of similar messages, stating that there is a 0x7 in the yaml .... I can't hear any bells though ;-P

The combination of Jenkins 2.375.1 and Kubernetes plugin 3734.v562b_b_a_627ea_c works fine with the same config file.