I got the above error and I was checking the report and RTF template both was fine but still I was not able to figure out what went wrong and then checked the Concurrent everything seeemed to be fine. But still I was not able to figure out.
Then while submitting the report I noticed the Layout was not captured. So I checked the name of deployed concurrent short name and Data Definition name and both are correct. Then I checked the style required and then the layout was captured. I compared with the working reports style checked was not there. However this actually Issue raised due to change of Text report to XML report.