Save/Share Map - Buttons not Working[Bug]

I am running Kelper gl on docker. Everything is running just fine. But when I click on Save Map or Share Map and click on Dropbox or Carto login button, nothing happens. Can you identify what is the problem?

Start by reproducing the issue in the Docker setup and inspect what happens when the Dropbox or Carto login buttons are clicked from Save Map and Share Map. Compare both login flows and their browser behavior; the work is done when the buttons initiate the expected login or the failure is clearly identified and covered by a regression check.

Written by the indexing model from the issue text.