SSRS Report- All works except ONE report

Hello Peers, I am having a issue where all reports works except Material Queue Report. (E10.1.500.8)

Any idea to fix this issue?

The error is

Program Ice.Services.Lib.RunTask raised an unexpected exception with the following message: RunTask: Client found response content type of ‘’, but expected ‘text/xml’.
The request failed with an empty response.

The request failed with HTTP status 503: Server Error.

Regenerate Data Model and Recycle IIS App Pool fixed it…