When you add a distribution group with an email address as the participants for a task and you do not resolve the group to users, enabling an escalation email for the task results in the workflow instance going into error state.
The following error occurs: “The parameter ‘addresses’ cannot be an empty string. Parameter name:addresses”.
The fix is available in the following K2 versions:
|K2 4.7 March 2018 Cumulative Update
||K2 Five (5.0) September 2018 Cumulative Update
||K2 Five (5.1) November 2018 Cumulative Update
||K2 Five (5.2) May 2019 Cumulative Update
||K2 Five (5.3)
||Fix Pack 23
||Fix Pack 30
- Ensure you have the correct K2 version and/or Cumulative Update installed. See KB001893 to see what Fix Pack level you have installed.
- Download the latest Fix Pack using the links in the table above for the version you require.
- Install the Fix Pack to apply the fix.
- You will have to start a new instance of the workflow in error state.