It seems that the 500 errors are related to the framework (you get those both in PaperUI and HABmin… they both use the REST API which spits out the 500s)
I don’t know if these framework errors are caused by the Z-Wave binding (I doubt it). People using both versions of the Z-Wave binding are seeing these framework errors in Snapshot builds greater than 1025.
So: I believe that we have 2 separate issues here:
(a) NPEs for the standard Z-Wave binding due to ThingTypeI18nLocalizationService (logged under: 4152)
(b) Internal Server Error 500 due to REST API being “broken” (not logged anywhere yet)
(maybe the 2 issues are associated… somehow?)