SciMLTutorials local instantiation failure: Permission denied

New to Julia
1

Hi there,

I have cloned SciMLTutorials.jl to a local repo at my desktop. Then, following the instructions at the bottom of the original github page, I tried, after launching Julia from the recently cloned root directory of the local repo (SciMLTutorials):

using Pkg, SciMLTutorials
cd(joinpath(dirname(pathof(SciMLTutorials)), ".."))
Pkg.pkg"activate ."

without any (apparent) problems at all. However, after

Pkg.pkg"instantiate"

I got the following error:

    Updating registry at `~/.julia/registries/General`
ERROR: SystemError: opening file "/home/orca/.julia/packages/SciMLTutorials/mub6c/Project.toml": Permission denied
Stacktrace:
  [1] systemerror(p::String, errno::Int32; extrainfo::Nothing)
    @ Base ./error.jl:168
...

How should I proceed to have this work, and then be able to locally weave a given tutorial notebook?
Thanks.

PS: I do not know if this is relevant, but a few days ago, I did add the SciMLTutorials.jl package to another Julia project (in another environment)…