The issue is in betalabs only.
As a user with the enabled option "Enable the editor help panel", start editing article on mobile -
https://en.m.wikipedia.beta.wmflabs.org/wiki/Zilant22#/editor/all - the Console will display the following error:
Uncaught TypeError: mw.ForeignApi is not a constructor at new HelpPanelSearchWidget at helpPanelProcessDialog.HelpPanelProcessDialog.initialize at helpPanelProcessDialog.OO.ui.Window.setManager at OoUiWindowManager.OO.ui.WindowManager.addWindows