Only fixed seed at secondary place in the AIN-Code (35.195.186.78) is reachable and use correct version.
For quick fix, please set new DNS-Settings for testnet-seed.defichain.io. You can use some of the IPs, too: https://mydeficha.in/en/index.php?site=testnet or use this seed: testnet-seed.mydefichain.com
Summary
Only fixed seed at secondary place in the AIN-Code (35.195.186.78) is reachable and use correct version. For quick fix, please set new DNS-Settings for testnet-seed.defichain.io. You can use some of the IPs, too: https://mydeficha.in/en/index.php?site=testnet or use this seed: testnet-seed.mydefichain.com