Alarm Console in Operator Console does not load alarms.
The alarmviewer-api webapp is what allows for the alarms to be seen in OC. (screen shot of the wasp configuration on the OC server)
You should check to make sure that that webapp is working correctly by reviewing the following log files:
C:\Program Files (x86)\Nimsoft\probes\service\wasp\logs\alarmviewer-api.log
C:\Program Files (x86)\Nimsoft\probes\service\wasp\wasp.log
Also you can try the following if there is an issue:
-delete the ../wasp/work directory
-delete the ../wasp/webapps/alarmviewer-api directory