The unmodified converter is at best dodgy when it comes to working, even for vanilla CK2 -> EU4. It has numerous issues; for example I haven't been able to get it to convert with proper localisation for over a year now, and still to this day. Paradox consistently ignores bug reports with it, is slow to update and for a large span even had it literally working for no one for months on end. Every time I've tried to improve it I've found new issues etc. After almost a year of that I had enough of it and gave up on any hope of it being fixed in an agreeable manner.
It still does get the bare minimum updates to work with all that aside and should still work; talking about the CK2+ converter here. We just won't jump through hoops anymore for something Paradox themselves barely cares about nor will we provide (tech) support for it as most likely the issue in question is out of our hands anyways.