Pages unable to get online for Collaboration

Hi team,

I'm running OSCatalina 10.15.4 with Pages v10.0 on a 2019 MB Pro and I'm running into a problem with the Collaboration feature in Pages.

I, Apple Account A, have been added to a pages collaboration hosted by Apple Account B. Apple Account B is a 2014 MB Air running OSCatalina 10.15.4 with Pages V10.0.

Both Apple Accounts A and B are using the same home wifi access, wifi works as it should.

Both Apple Accounts A and B have plenty of iCloud storage, both have pages synced to iCloud and both have access to the collaborative document with editing permissions. But when the document is opened on Apple Account A (2019 MB Pro), the "Collaborate" icon just spins and I am unable to make adjustments or view live changes.

Eventually I get a red error icon on the "Collaborate" icon and a display message of "You're offline. Until this document has synced with iCloud, offline edits won't be included when you share, copy or export from the finder".

As soon as the document is closed and opened again, I instantly see any changes made by colleagues - even changes made within the last second before opening the file. But as soon as the file is open, its unable to show updates and tells me the document is offline.

Apple Account B has a working "Collaboration" icon and is able to see who has access and make live adjustments.

I have tried hosting the document from Apple Account A and giving collaborative permission to Apple Account B, but the same issue arises. Apple Account B is able to edit the document online and Apple Account A is unable to edit the document as it is "offline". It doesn't matter who hosts, or who is added as a collaborator - Apple Account A is always unable to edit and get the document online.

What can I do to fix this?