Your plots is pretty outdated - the current version is 1.38.11. Do add Plots@1.38 in the Pkg REPL to see what’s holding it back.
On a related note, it is not recommended to install all packages in the default environment. You should keep only development dependencies like IJulia, Revise etc. in the default environment and work in project specific environments with only those packages needed for a specific piece of work to minimise these kinds of version conflicts.