Downloading nextflow dependencies. It may require a few seconds, please wait .. curl: (6) Could not resolve host: www.nextflow.io

ERROR: Cannot download nextflow required file -- make sure you can connect to the internet

Alternatively you can try to download this file:
    https://www.nextflow.io/releases/v26.04.2/nextflow-26.04.2-one.jar

and save it as:
    /tmp/.nextflow/framework/26.04.2/nextflow-26.04.2-one.jar