I am getting this same error on my MacOS (v. 13.6.5)! I installed julia using the command
>curl -fsSL https://install.julialang.org | sh
When I typed julia in the command line, it didn’t recognize that command. I added an alias to the julialauncher executable. When I run the julia alias command, I get the error
Error: The Julia launcher failed to figure out which juliaup channel to use.