Unfortunately, the initial builds for Tiled 1.8.4 didn't upload correctly, likely due to some mistake I made yesterday night while being in a hurry to replace Tiled 1.8.3 (which introduced a new crash). Lesson for next time: maybe it's better to wait until morning to publish a new release. :-)

In any case, I've uploaded the Tiled 1.8.4 builds properly now!