This happens when trying to run the built application of the tracker:
/usr/bin/obs: symbol lookup error: /usr/lib/x86_64-linux-gnu/libQt6Xml.so.6: undefined symbol: _ZN9QXmlUtils6isCharE5QChar, version Qt_6_PRIVATE_API
This is most likely specific to my machine and configuration, so it would be good to try this out on other linux machines. I am running PopOS! 21.10.