Unable to download binary files from working copy

I use one continuum master and one continuum buildagent.

Everything is working fine when building, but when I go to working copy and try to download the jar that the project produced, the "Download as text" box appears. If I click the link at "Download as text, I get an error message: "The URL requested results in an internal error."
I have attached a part of the log file.

If started with "continuum console", I get the following error: [Fatal Error] :1:140: An invalid XML character (Unicode: 0x3) was found in the element content of the document.