my suggestion for everybody is:
- stay with openHAB 2.4 (OH 2.5.x is going under a big change in the build system)
- if you want to test OpenWebNet binding follow carefully the Installation instructions on the README here: https://github.com/mvalla/openhab2-addons/tree/openwebnet-old/addons/binding/org.openhab.binding.openwebnet#installation
- the latest suggested OpenWebNet binding version to use is 2.5.0.M2-1; the JAR can be found here: https://github.com/mvalla/openhab2-addons/releases.
2.5.0.M2-1 is compatible with OH 2.3 & 2.4
bye Massi