Can't get past rclone config - cannot create custom remote

welcome to the forum,

that is a five year old, custom compiled development version of rclone, from an out of date repository.

  1. uninstall that version
  2. https://rclone.org/install/#script-installation

protondrive was added at v1.64.0. current version of rclone is v1.72.1


https://forum.rclone.org/t/proton-drive-mark-it-as-unsupported/52742