Here's what worked for me:
- I entered my spouse's SIN (perfecter than perfectly), gave me the error listed above.
- Cleared my cache, logged back in.
- I changed the last digit of her SIN, pressed enter, changed it again, pressed enter (basically went 0-9), no luck.
- Then I entered my SIN, pressed enter, no luck.
- Then I copied her SIN from last years, T1, pressed enter, BINGO.
Dont forget to rub tummy and pat head while spinning in a circle.
