Notice new icon in upper right corner with a white exclamation mark on red, indicating an error or immediate action required.
Click on icon, modal popup says:
You don't have any remotes which have extended integration settings configured; you need to edit your remotes to add details such as the hosting type and base URL. Click the Settings button to open your remote list.
Click on the Settings button, this opens the "Repository Settings" dialog.
"origin" is present as expected for this project. Select it, click edit.
There's no obvious way to edit the "Generic Account" from there, and no support for GitHub Enterprise in the Legacy Account Settings dropdown.