Hi Vinod,
I would recommend enabling logging for login agent on one of the runtime resources as detailed in the Login Agent - User Guide which can be found on the portal
https://portal.blueprism.com/documents/standard this will provide you with more information about the error. I would then raise this as a support request so our team can investigate further.
Regards
------------------------------
Chris McGowan
Senior Technical Consultant
Blue Prism
------------------------------