Ok. I imagine this is JuliaPro related. I’m not sure how to fix it but I recommend taking a look at the links listed in this thread. Seems like others have had issues loading packages on remote worker processes when using JuliaPro.
To answer your other question:
I download the binaries from julialang.org/download. Every so often I’ll also clone the current master branch of the julia git repository and build it from source to see what’s happening at the bleeding edge, maybe poke around Base and the standard libs a bit.
As for running code, I tend to use jupyter notebooks for more exploratory stuff. Otherwise I just launch julia from the command line and run scripts using include. I use vscode with the julia extension for editing.