Error in declarative action "JSONObject["value"] not found."

[mrsnowlearn]

I have created a declarative action "Assign to me" on sc_task table. This will visible when current logged in user is part of assignment group and if state of sc_task is open. This declarative action is working fine for some assignment group members. But for few groups when I click on it then it is giving me error message  "JSONObject["value"] not found.".

Can someone please help me the reason behind this issue and help me in resolving this issue?

[RaghavSh]

can you share your declarative action configuration?

[RaghavSh]

@mrsnowlearn Can you share the config