In some points such gkeConfig/service_account_json and ddlConfig/schemaFilePath the file is handled as absolute.
However, in others such jMeterTemplatePath, it's being handled as relative to the current solution, which is confusing and made me move my configurations to the solution folder to work.
Got the problem during the following command:
kubectl cp %s -n %s \"$(kubectl get po -n %s | grep jmeter-master | awk '{print $1}'):/%s\"")
which concatenated path twice:
/Users/rgodoy/Documents/machmeter/machmeter/Users/rgodoy/Downloads/machmeter-confs/templates/data-load.jmx