[2.3.0] Checkmk Werk 17091 created: missing error message for wrong backup key password

[//]: # (werk v2) # missing error message for wrong backup key password key | value ---------- | --- date | 2024-07-02T12:50:08+00:00 version | 2.3.0p10 class | fix edition | cre component | wato level | 1 compatible | yes When a wrong password was entered for downloading a backup encryption key or a signature key for signing agents, an empty error message box was displayed. Now, the error message is displayed correctly.