Process Instance is getting Pause at Write to data store node

Hi All

I have a related action at record summary dashboard, when I initiated related action, I am able to see interface mapped at User Input task, but when I fill and submit the form,

I observed two things,

1) I am getting not authorized message at UI.

2) My process instance is getting paused at write to datastore node.

I checked process instance data, process variables having proper data to store,

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