[HELP] Rename tracks help please and help with chapters

[Mapsking]

The two error popups shouldn't cause any problems and can be ignored.
Dnon't need a debug output, since I can reproduce the issue here.

OK, well they can't really be ignored, as after they displayed, the program crashed, and would not open, at least for me.  Just FYI.

Also, I think I got distracted, and never actually asked about the chapters, and I don't know if it is a problem with the program, an external program, or something I'm doing wrong, but if I use a chapter.xml file (for example, The attached one), and put it into .mkv, the output file is completely blank, and has zero chapters, even though they all seem to be in the chapter queue correctly.  This specific one was generated from MKVToolnix, from the original source file.  The Logs and the sample files are attached, as well as the chapter file I had to generate from a different program (Drax) that actually worked (from the .mp4 file I had already encoded previously).  Please let me know if I am doing something wrong.  Just FYI, this particular movie does not actually have chapter "Titles", which is why they are all labeled "Chapter 1 and so on", but I am very particular about naming all of my movies with appropriate text for my chapters, if the actual movie has them listed.  Clearly, the two files are different, the formatting is different, but both styles are well-known.  Would you be willing to consider adding MKV XML chapter support into Hybrid if it isn't already?  I thought it was?  Also, I notice on Base>Chapter, it shows chapters 1-32, but there are really only 28 chapters here.  Is it looking at something other than the actual chapters in the movie?  Hopefully that wasn't too confusing.