can I revert to older version of Pages?

I have Pages v14.1 currently running on Ventura without issues. Before I upgraded my Sonoma 14.7.1 system to Sequoia (currently v15.1.1), I had Pages v14.1 and v14.2 running on Sonoma without any issues. All of my files are stored on the local drive, and by that, I do not mean by application proxy to a Microsoft OneDrive, Google Drive, or DropBox remote cloud.

I have never felt the need to remove any version of Pages and replace it with an older version from a Time Machine backup. I recommend that you attempt to fix what issue is causing the current Pages behavior since removing Pages v14.2 and restoring an older version is not something I can predict the outcome.

Let's start with these questions:

1. When you launch Pages v14.2 without attempting to open a file, does it crash immediately or do you get to the Template chooser?
   1. If it does immediately crash, before you launch it again, press and hold the shift key while launching it. That will prevent it from referencing its last saved application state and this frequently avoids the crash cycle.
2. Does Pages crash upon your opening a specific file or any Pages document? Was this a local file, cloud-based file, or stored on network attached storage (NAS) filesystem?
3. Have you rebooted your Mac and the problem persists?
4. Have you rebooted your Mac into Safe Boot mode and then experienced Pages not crashing with the same document that it crashed previously? If it did not crash, reboot normally and see if Pages crashes again.
5. Are you running any anti-virus, or so-called Mac "cleaning" applications, or using a VPN connection? These have been known to create odd circumstances in applications and the operating system and should be removed.

I think that before you reinstall the operating system, you might consider moving the existing Pages property list file to your Desktop and then relaunch Pages to see if it continues to misbehave. If not, it was that file which it will recreate, and if it so, then reinstall the operating system by booting your M1 Mac into Recovery.

The Pages property list file is here:

/Users/yourname/Library/Containers/com.apple.Iwork.Pages/Data/Library/Preferences/com.apple.iWork.Pages.plist

Beyond these measures, I have no other suggestions than already offered.

I think at this point, it might be interesting to see if the future point release of Sonoma (if there is one), or another Pages version update resolves your current issues. In the interim, try Pages v14.2 without any other user applications active. Review your remaining storage too.

Realistically, I have no solution for you based on what you have already done and do not have installed. It can take Pages a while to open a document, especially if it is a large mixed content document, or you attempt to launch Pages while Spotlight is indexing (right after first boot), and/orTime Machine is running.