Merchant notifications cancelled means your store or app has turned off sent alerts. These may include order updates, payout notices, or system messages. If notifications stop, you may miss time-sensitive events.
This can happen after a settings change, app removal, permission issue, or email problem. It may also occur when a billing, delivery, or integration rule blocks the message flow.
Check notification settings in your admin panel first. Then confirm email addresses, app access, and event rules. If the issue continues, test another channel or contact support for review.