Plugin is partially working in 4.3.13

[ebeng]

Hello,

The plugin was working fine and configurable within 4.0.x version. I have now upgraded Graylog to 4.3.13 and the notifications, which were set in the Alerts do still work. However, in the list of notifications, I cant select the pushover notifications anymore.

Any idea if the plugin needs to be upgraded? or adjusted?

[ebeng]

graylog-server]$ cat server.log
2023-04-06T18:04:32.187+02:00 INFO  [ImmutableFeatureFlagsCollector] Following feature flags are used: {}
2023-04-06T18:04:32.915+02:00 INFO  [CmdLineTool] Loaded plugin: PushNotification 2.0.0 [com.itchannel.PushNotificationPlugin]
2023-04-06T18:04:32.916+02:00 INFO  [CmdLineTool] Loaded plugin: Notifications 1.0.0-SNAPSHOT [notifications.NotificationsPlugin]
2023-04-06T18:04:32.917+02:00 INFO  [CmdLineTool] Loaded plugin: AWS plugins 4.3.13 [org.graylog.aws.AWSPlugin]
2023-04-06T18:04:32.918+02:00 INFO  [CmdLineTool] Loaded plugin: Collector 4.3.13 [org.graylog.plugins.collector.CollectorPlugin]
2023-04-06T18:04:32.918+02:00 INFO  [CmdLineTool] Loaded plugin: Threat Intelligence Plugin 4.3.13 [org.graylog.plugins.threatintel.ThreatIntelPlugin]
2023-04-06T18:04:32.918+02:00 INFO  [CmdLineTool] Loaded plugin: Elasticsearch 6 Support 4.3.13+7f1d15d [org.graylog.storage.elasticsearch6.Elasticsearch6Plugin]
2023-04-06T18:04:32.918+02:00 INFO  [CmdLineTool] Loaded plugin: Elasticsearch 7 Support 4.3.13+7f1d15d [org.graylog.storage.elasticsearch7.Elasticsearch7Plugin]

[itchannel]

This version should fix the issue, it adds compatibility with 5.0 Graylog which addresses the 2 issues you've raised so should still work with 4.3.13

https://github.com/itchannel/graylognotifications/releases/tag/2.1

[ebeng]

Nice! Just seeing it now. Will try it out tomorrow. Thx!

[ebeng]

2023-06-02T15:36:12.330+02:00 INFO [ImmutableFeatureFlagsCollector] Following feature flags are used: {}

This is happening when I try to start the Graylog, with the new plugin. How can I see more why this plugin is stopping Graylog to start?