Indeed its sad and its just Pakistani students who are receiving refusals aftar AIP. I have not seen any other nationality receiving refusals after AIP. Further, refusals are baseless in many cases as Afrokk said he does not have any travel history but still one of the reasons for refusal was travel history.
One thing is for sure that this letter is the AIP as everyone receiving the same letter. However, question is why eligibility met for Edmonton but not for Abu Dhabi office? I read your other comments and agreed that Abu Dhabi is the one who issues the final decision and Edmonton is just checking preliminary documents check for eligibility. However, do you think these refusals justify? And on top of that reasons for refusals are pointless.
I think either AIP or these refusals are sent by mistake and students should rIse the issue with IRCC.