Error: Call to a member function getFormModeOptions() on null

dan_metille → made their first commit to this issue’s fork.

Same error while updating from Commerce 8.x-2 to any 3.0.0 version. Any idea about how to fix it?

Do you define a custom checkout pane extending the Login pane? This isn't happening for me on a default install, so I'm assuming custom code is triggering this, therefore lowering the issue priority.

Closing this as this isn't happening on a Vanilla install... Feel free to reopen in case you are able to provide reproducible steps on a clean install.