Probably your path to the bootloader addresses a wrong file. The mention of "Release" in the error message makes me suspicius.
Another hint: You are not using the latest Creator version (3.3 CP1), there are updates for some components available.
its working now, I updated the creater to the latest version, then changed the build to Debug instead of Release, also there was a problem with bootloadable component setting, the hex file being addressed was wrong.
Now its working perfectly, the build time is also fast
You are always welcome, a.