Do you have both standard Julia and JuliaPro installed?
Similar problems have been reported before:
- JuliaDB with Parallel Procs Not Working in JuliaPro - #22 by dburch
- Bug? JuliaPro Distributed Procs
- Julia 1.0.2 after installed JuliaPro 1.0.2.1
- Workers do not find packages in spite of @everywhere and Pkg.activate commands
Clean installs seem to have resolved the issues.