If a user is unable to send messages in Symphony and/or sees an error message stating Could not decrypt this message (Figure 1) or Failed to send (Figure 2), the likely root cause is the Key Manager being unable to retrieve a key from the Keystore.
Figure 1 Could Not Decrypt This Message
Figure 2 Failed To Send
If this issue is experience by one user, it maybe a local caching problem and clearing the cache will rectify the issue. Refer to the Knowledge Article found here on how to clear your cache.
If the issue is happening to multiple users, please follow the below steps:
1. Perform a Key Manager Health Check: