Can you find a file named "vpp.pm" in a directory named "version" anywhere in the original XPs? It looks like version::vpp is the pure Perl version of the module version.pm that's used if the version::vxs cannot be loaded. What does

perl -e "use version::vxs; print 'Hello'"
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do? Does it print an error or "Hello"? If an error, what's the error? Any chance you have two perls installed and the one you started tries to use the modules of the other? Or maybe you overwrote one installation with the other?