Apple's Pages is not responding

You can quit Pages by forcing it to quit. Press the option key and right-click on the Pages icon in the Dock. Select Force Quit. Reboot your Mac. Are you using Pages v13.2 — which is expected for Sonoma 14.2.1.

Now, press and hold the shift-key while launching Pages. That will tell it to ignore loading its last execution state, and should open normally. From the File menu, use open File and select that same document that you were working on. Does it open normally, or is there a dialog present that I should know about?

Apply the Sonoma 14.2.1 update if you have not already. Probably nothing to do with Pages, but always important to stay current with the operating system updates.

I use Pages v13.2 on macOS 14.2.1 and the application exhibits no misbehavior of any kind with locally stored documents.