We had to build a new LibreNMS server, and while everything populates in it correctly as far as devices, the devices do not populate in the “Match devices, groups and locations list” or the Transports list any more in Alert Rule setup. It worked when I originally built the server, but now everything is blank. When I go to an existing alert rule and click edit, the entire rule is blank as if it’s a new rule, instead of containing the configured information. On the main alert rule page, however, it shows the rule set up correctly. I’m not sure where to go to fix this, We’ve made no changes to the server other than updating it occasionally.
You’ll need to check the web developer tools console for errors.