Ok. I was able to debug this over a satellite connection. It took awhile but the issue appears to be the first line of the advancedsettings.xml file. According to the logs there is a space in the first character in the first line before:
<?xml version="1.0" encoding="utf-8"?>
I get the same failure with the space. If I remove the space the Kodi Selective Cleaner opens fine. Can we try removing the initial space character ? I can’t do anything to fix it in the code from here.
FYI, I came up with a simple code fix for this in the future where the XML parser will ignore leading and trailing whitespace characters. I’ll add this to the next release. I was able to test it and it works.