I got server error, but I don't know why

[QQlol]

When  I deploy my application , I got the server error message.
And I also checked my log, I didn't find any errors.

I used google app engine launcher 1.6.1.

Please someone help me to solve this problem. 

Thank you very much

[Carsten Dressler]

I think this is a known issue.  You can find it the issue tracker.