Update: I woke early this morning to call the IRCC and speak to an agent again to see how to do to fix this issue and proceed further with my application, because yes the IMM5707 form Family Information is stille there in the document checklist as REQUIRED!
My boyfriend tried to start an application from his cellphone too with different details and the IMM5707 keeps appearing among the required documents. Now, the agent suggested to upload an explanation letter where to state that I do not have add a family information form for my application even tho the system keeps including it. Honestly, I am not sure about this solution even if it comes from a IRCC agent, what if my application is refused by being considered incomplete or just wrong?
Does anybody from a Visa exempt country who wants to extend his visitor status had the same issue??
Please help, because I am considering to go to US and re-enter Canada by land, hoping that the CBSA stamp my passport along with an extension.