Since some days we can't deploy to the sandbox anymore. Create a deployment package (also unversioned) give's the same error, as do a build with MsBuild.exe:
ERROR: Could not build your widgets. This may be due to outdated widgets in your project. You can check which widgets failed to build by clicking Tools > Check Widgets. BUILD FAILED
The check widgets show's that all widgets are outdated (but they are all the last version).
The file "deployment/data/temp/dojo/buildreport.txt" is not being created. The only log that I can find is buildwebuibundle_log.txt:
Building Dojo...
Error Warning: Task "dojo:dist" failed. Use --force to continue.
Aborted due to warnings.
This is to less information to find the problem. How can I debug the building and where can I find error logs?