Everytime I change the dock postion example Centre or Topleft or anywhere in the console after reload it says -

[Magic Panel] Dock 'centre' does not exist for panel 'MagicPlayersPanel' and then does not display ingame anymore. I have tried all the dock loactions same issue. Any help to this issue?

Dock name/positions come from MagicPanel.json. Check your config there for the names of the dock. You can also add new docks there.