There's a project called codexctl that can help you run an offline update to the latest firmware https://github.com/Jayy001/codexctl
Someone on Reddit also pointed out there is a support page for the clock issue https://support.remarkable.com/s/article/Unable-to-update-re...
reManager is far better for this use-case [0] instead of these fragile scripts.
[0] https://github.com/rmitchellscott/reManager
Someone on Reddit also pointed out there is a support page for the clock issue https://support.remarkable.com/s/article/Unable-to-update-re...