I seem to have solved it

I had JSON and JSON::XS installed in my home dir, for some reason. So I installed cpanminus so that I could uninstall them: cpanm -U JSON and cpanm -U JSON::XS

And now it works, since they are installed system wide as well

In reply to Re: Strange error when using JSON module "XS.c: loadable library and perl binaries are mismatched" by WithABeard
in thread Strange error when using JSON module "XS.c: loadable library and perl binaries are mismatched" by WithABeard

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