ElixirLS (VSCode extension) installation issue on WSL2, Ubuntu

I’m experiencing the same thing. I believe it’s a bug in the brand-new v0.14.0 release. I’d recommend reverting to v0.13.0 until it’s resolved, which will hopefully be soon.

Extension settings:

Click the down arrow next to Uninstall, then Install Another Version…

Select 0.13.0. May need to reload VSCode.