Minifi Toolkit Error

Hi,

I'm new to Minifi and just got minifi cpp running with the listed examples from the github repo. In the next step I want to run my own config.yml files. Unfortunately the minifi cpp repo doesn't explain the tranformation process from Nifi to Minifi. However, on the minifi website I read that the minifi toolkit is used for the transformation process from the template xml to yml-file. I downloaded the latest toolkit version (v1.14.0) and exportet a simple flow template as xml (Nifi-version is 1.12.1). When I try to convert the xml-file using the toolkit I get the folowwing error:

[user@ip-xxx bin]$ ./config.sh transform input.xml outputfile
config.sh: JAVA_HOME not set; results may vary

Java home:
MiNiFi Toolkit home: /home/user/minifi-toolkit-1.14.0

Error reading template. (javax.xml.bind.JAXBException: Implementation of JAXB-API has not been found on module path or classpath.
- with linked exception:
[java.lang.ClassNotFoundException: com.sun.xml.internal.bind.v2.ContextFactory])

Transform Usage:

transform INPUT_FILE OUTPUT_FILE

Any ideas what the problem is?

Best regards