If you connect your Autotask to a Fantom Relayer, you should get access to the network directly using a DefenderRelayProvider.
I've gone through the txs to that contract, and I'm not sure it's operational. The only txs I see are from the Deployer account for setting it up, and then a single failed bond operation (which I'm going to guess is yours). Did you get confirmation from the keep3r team or the fantom team that it's open to the public?