#233 xxdiff crashes on launch

[Celso Frazao]

Downloaded xxdiff-4.0b1.osx.dmg from http://furius.ca/downloads/xxdiff/releases/macosx/ & launched it. Moved xxdiff.app to my Applications folder.
When I double-click it, it just dies with no clues.
When I run it from the Terminal command line (with "open -a xxdiff.app <file1> <file2>"), it pops up a window saying "Diff error: <gibberish>" repeatedly, filling the entire height of my screen. (There is no scroll bar, so I'm unable to view the end of the message). The only thing I'm allowed to do is close the popup window, which terminates the program.</gibberish></file2></file1>

Running on Mac OS X 10.11.6 (El Capitan).

Would greatly appreciate your help troubleshooting this. Thanks.

(Note: "Milestone" field on bug ticket form shouldn't say "Compilation Issues" but there doesn't seem to be any way to change it)