We currently have Mattermost 5.13.0 running and recently tried to add this plugin. However, anytime we try to confirm a subscription we get the following error:
SNS BOT Error: We could not decode the action
The notification of a new subscription comes through successfully and provides a clickable button to confirm the subscription, but fails to actually subscribe. We've tried using different channels as well as confirming different subscriptions If I can be of any help and provide any kind of logs, please let me know. We'd really like to use this plugin to have our cloudwatch alarms trigger a mattermost alert.