missing child element?? - [ ] Fatal error: line 149, column 24: Element direction-type is missing child element.

It does get loaded though, when you ignore that error

Still MuseScore 4.0.0 (which created the file) should not create MusicXML files with such errors

Maybe this is another variant of #293441: [MusicXML export] invalid XML export: direction-type is missing child element or #326798: [MusicXML] Ties in cue notes?

Can you share the score (mscz) that this XML got created from?

Actually here's the xml snippet:

      <direction>
        <direction-type>
          </direction-type>
        </direction>
 

And indeed that direction-type element is empty, no child element