If you recently got problems trying to install addons on openHAB see below:
openhab-cli showlogs and observe similar errors:
Error downloading mvn:org.openhab.addons....
openhab-cli info to locate the
Sudo edit this file:
sudo nano /var/lib/openhab2/etc/org.ops4j.pax.url.mvn.cfg
Change the entry
org.ops4j.pax.url.mvn.repositories= \ https://openhab.jfrog.io/openhab/libs-release@id=openhab,\ https://jcenter.bintray.com/@id=jcenter
No need to reboot. Just wait 5 minutes. In our case, installation requests were satisfied automatically without having to re-request them from PaperUI.