Error: sys.webforms.pagerequestmanagerservererrorexception:an unknown error occured while processing the request on the server. the status code returned from the server was :12152" in report server?

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SSRS

Hi

I am getting the below error while executing one report in the report server:

"sys.webforms.pagerequestmanagerservererrorexception:an unknown error occured while processing the request on the server. the status code returned from the server was :12152"

I have searched in google but coul not able to find the root cause of it.

Checked the DB timeout settings, web.config timeout settings but no use.

Can anyone help?

Regards,
Dhivya