I have looked through the website, and didn't find the new version of IMM 5669. The odd thing, I found, filled and uploaded this form 6 months ago and now CIC are asking for it again !Go to the CIC website (here) http://www.cic.gc.ca/english/
Then type 'IMM 5669' into the search bar top right. You should use the Jun 2017 latest version.
I always keep a copy of all CIC documents, and I was able to open it and check on the file's contents. Now, the document is blank and says update your adobe reader, eventhough all other PDF files are fine !
Has anyone experienced a similar issue before?