Sorry if I am using it wrong or it's duplicate report.

Running lychee (lychee-v0.11.1-windows-x86_64) on a local absolute path on Windows gives the following error:

>lychee.exe "C:\asd"
Error: Network error

Caused by:
    0: builder error for url (c:\asd): URL scheme is not allowed
    1: URL scheme is not allowed

Running it from that directory with lychee.exe . works!