We ended up with a SLA referring to a feed that no longer exists. The SLA edit screens and the screens listing the SLAs generate error popup. The SLA can not be modified/deleted because of the error popup does not allow loading of the screen.
Logs sent separately.
To fix do the following:
1. stop kylo-services
2. copy the correct feed-manager-controller.jar corresponding to your kylo version into the /opt/kylo/kyloservices/lib and overwrite the existing jar.
3. restart kylo-services.
4. Click into the SLA that should be deleted. You should now be able to open the SLA.
5. Delete the SLA.
NOTE: You may have to manually clear/handle any alerts related to this SLA in the Operations Manager. (this will be fixed in 0.8.4 via )