Thanks, i updated everything (and changed to modern framework), and the problem is gone
Theres another issue after updating, its saying
uipath.IntelligentOCR.Activities.Actions.Model.DocumentClassificationActionData
is not defined when i try to initialize a list of DocumentClassificationActionData
i found out its because my keyword learning json contains two occurrences of the same documentID. I dont know what caused this , maybe it wont happen againonce i update to the latest version