I can’t open pastebin from my work network and my phone is pretty much useless for reading logs. Go through the logs, look for lines that have the word “ERROR” and report what they are or if there are any.
Removed my /var/lib/openhab2/jsondb/automation_rules.json and associated backup files (nothing I can’t easily re-create fairly easily)
Uninstalled the Add-On, shut down openHAB2, cleared cache, resarted openHAB2, attempted to install the Rule Engine addon and got the following same/similar error repeating multiple times:
2020-06-25 00:33:37.794 [ERROR] [org.openhab.core.automation ] - bundle org.openhab.core.automation:2.5.0 (263)[org.openhab.core.automation.internal.type.ModuleTypeRegistryImpl(357)] : The activate method has thrown an exception
Scratching my head on this one. Installing or Uninstalling this Add-On from the PaperUI generates a slowly turning progress wheel (like expected) however it never stops. Refreshing the page shows it appropriately installed (or not) however nothing in the menu structure on the left still.
Following these recommendations (post above) Rules is now visible in PaperUI. The jsondb backup and refresh is going into my list of things to do if I’m having issues.