Ran into a problem today with advanced alerts trying to edit some trigger conditions and they're blank! I've checked multiple rules, and I get the same thing:
I would run the Configuration Wizard for the Website and Database. I've seen issues with variables not populating and what-not, and the Configuration Wizard fixed them.
Running a config wizard is not a casual proposition without explaining possible ramifications of losing custom HTML, or wreaking havoc on discoveries.
I would bounce services, or reboot the server before doing a config wizard. This is just an example of a minor nuisance of a giagantic semi-clunky web based product.
I faced this issue once, and it was fixed after resetting the IIS service on primary polling engine. You can give it a try.
Ended up resolving itself over the weekend. Not sure what caused it, server hasn't been rebooted in a few months so I'm not sure if it resovled on its own or what!
This happens from time to time in our environment. We have a particularly pesky alert that has 40+ components in an OR tree. I try the following to in order to resolve it:
1. Refresh the page
2. Type IIS Reset in the cmd prompt on the web server
3. Bounce the application services
4. Reboot the web server (I've never had to go past this step)
5. Reboot the database
6. Rebuild the website
Lastly, I recommend adding the AppInsight for IIS to the web server to monitor performance and identify pain points.
