This error message may appear when you’re trying to adjust your subscription preferences in the following cases:
1. You purchased a subscription via the Apple App Store or Google Play Store and tried to apply a promotional offer or change your subscription plan.
The Apple App Store and Google Play Store manage the billing process on their side. As a result, promotional offers cannot be applied to those subscriptions, and attempts to change your plan via our website won’t be successful.
If you’d like to take advantage of our promotional offers, we suggest canceling your current subscription and, once it expires, purchasing a new one via our website once an offer becomes available.
2. You signed up for a free trial of Grammarly Premium and tried to apply a promotional offer.
The option to take advantage of the offer while your account is on the 7-day free trial is not currently available. However, once your free trial expires, you’ll be able to take advantage of our special offers.
If none of these cases apply, feel free to contact our Support team for assistance.