I have recently been trying to use Pages on some files that reside in OneDrive. I get a frequent (e.g., every 2-5 minutes) message saying " The document “[Insert Document Name].pages” could not be saved. The file has been changed by another application. - - - Due to these unexpected changes, Pages may be unable to save your changes. Click Revert to load the changes made by the other application. Click Save Anyway to attempt to overwrite the changes made by the other application. You can also click Save As to attempt to save your changes to a different file."
I select Save Anyway, and the message goes away, only to return a few minutes later.
I have searched forums and websites to find that this also happens in iCloud, but I have not really found any solutions. Any ideas?