Where did theoryx5.unwinnipeg.ca come from? is it specified on the command line? was it added somehow to your list of repositories? We need to know the whole command you used that resulted in this error.
It seems that is a typo, and it should be theoryx5.uwinnipeg.ca, but not knowing how you got this error message we cannot tell you what to do to fix it either
and this seems real similar to https://stackoverflow.com/questions/50505785/installation-mod-perl-2-0-ppd-via-perl-ppm-package, while cross posting is ok, it is considered polite to mention it.