SSRS reports downloading into pdf successfully but not ms word

I am getting below issue

For more information about this error navigate to the report server on the local server machine, or enable remote errors

Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: Microsoft.Reporting.WebForms.ReportServerException: For more information about this error navigate to the report server on the local server machine, or enable remote errors

Source Error:

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.