Error stratum with Iceriver AL2 Lite

Hi,
I am encountering the following error:
error | Unknown stratum method from ... mining.extranonce.subscribe when connecting an Iceriver AL2 Lite to my mining pool.
I do not experience this error with Iceriver AL0 devices.
I am running a full node using alephium-3.9.2.jar and a mining pool deployed via Docker Compose using the master branch of the GitHub repository: mining-pool.