I am on pop os 20.10 and downloaded Julia 1.6 from here. After running Julia, I tried to download the DataFrames package, but got the following error:
could not download https://pkg.julialang.org/registry/23338594-aafe-5451-b93e-139f81909106/4a23e902dd57241ed2fcb2462af6e428bcefd008
It fact, I get this error when trying to install any package.