Comment 4 for bug 519726

I concur with Andy Finch's comment. You seem to have a file missing which is needed for configuration to run the program, look at the last line of the output to catch a hint:

 File "/usr/lib/python2.6/xml/dom/expatbuilder.py", line 211, in parseFile
    parser.Parse("", True)
xml.parsers.expat.ExpatError: no element found: line 1, column 0

Here it is very clear that Python is trying to build a "dom" object out of an XML file. The very last line tells you: no element found. And obviously if column 0 and line 1 (the very first character of the file) doesn't exist, thus there is no file where there should be a file.

Replace any files you deleted, download a full package of this application to find the missing files, and/or reinstall.