Not sure if you tried the installer or the portable version, but for me, running the latter required me to put it in a location where it had permissions to create the 'lapce-data' sub-folder. (And no, there was no sensible error message when that inevitably failed).

Having said that, there doesn't seem to be very much "there" there, right now. I managed to open a C# project using the 'csharp-ls' language server, but, other than suggesting some refactorings that I couldn't successfully apply, there wasn't much that indicated that this actually worked. Debugging certainly didn't.

It did load very fast, though, so that might make it worth checking out again in, oh, a year or so...