The 2020.2 software stack has been released on Argon. This stack supplements the original set of modules. Some of the modules are newer versions of software that will be loaded in preference to modules from the original set. However, there are still packages available in the original module set that are not in the updated stack. This stack is not presented by default. To make the modules in the 2020.2 stack available you must first load a module that makes the stack available.
module load stack/2020.2
See Argon Software stacks for more information.