Hi Alexander,
I moved to new version 26.5 and here my results:
Please see:
Test data(input/output/QGIS)
5388 Gml Kml.zip (90.5 KB)
Thanks,...Bug 5388: Gml to Kml- Conversion succeeded, output in QGIS -...appears empty in QGIS. The conversion itself is successful, but...