That means a final decision has been made. Usually accompanied by a biometric validity letter. usually it takes a day for you to see the decision but it could be longer
To know the specific reason why you were rejected you can order your GCMS notes. What is your educational background and what are you studying in Canada?
Did your permit expire yet? Are you also applying for SOWP? if not have your MP contact IRCC about your application as it has passed normal processing times.
my application was processed in Edmonton
Can you take more classes online? Since you’re a year in a program I don’t think you can defer or switch to part time status. Since eligibility passed then you will probably get your permit sooner or later.