dask-sql hasn't been maintained since 2024. However, since dask 2025.1.0 release, dask-expr was merged in Dask. It is possible that latest versions of dask or dask-expr package are not well supported by dask-sql. You may need to try with older versions of them.

See https://dask.discourse.group/t/no-module-named-dask-expr-io/3870/3