I don’t care what it says in PaperUI. Karaf already says that it’s installed as a bundle and active. But I need to see what the REST API says.
I don’t think it is possible to get literally nothing back from that API call. You should either get
[ ]
or something that looks like
[{"id":"mapdb","label":"mapdb","type":"Queryable"},{"id":"influxdb","label":"influxdb","type":"Queryable"}]
Or an error message.
In any case all I can recommend is Clear the Cache. If that doesn’t work than there is something about your config that you copied over from Windows that is breaking rrd4j.
Did you try removing the rrdj4 files from $OH_USERDATA/persistence/rrd4j like I asked you to a few posts back? Does it work with a truely brand new rrd4j DB?