Yes, I faced this.
To fix this I asked my family member in India to download the voter helpline app.
They registered in the app using my EPIC card detail and my registered mobile number.
Once that is registered, they can try submitting form 7 directly from voter helpline app.
Also after registering on the app, you should be able to add the EPIC into your online service portal and submit form 7 from their.
NOTE: voter helpline app can be only downloaded from India location. If you search this app on play store in canada, it wont show up.