If your subtenant has stopped paying their rent, then they are in breach of your sublease contract. As there’s a breach, you may have grounds to evict your subtenant following the correct protocols.
Before evicting your subtenant, take the time to understand their situation. It could be a technical problem with their bank, or maybe they still can pay the rent in a couple of days. These situations are not always black and white, and more often than not, it’s more cost-effective to keep subtenants than to go through the process of finding a new one.