Facing error in assign activity . It works for some users but shows expection for few users. Assign: Exception has been thrown by the target of an invocation

Help
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1

Error
Assign: Exception has been thrown by the target of an invocation.
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2

There should be more detail about that error as it is a generic error message, what is in that Assign?

3

Hi
May I know what was mentioned inside the assign activity
cheers @ramees.pk