Unable to Generate Paginated View issue

Unable to Generate Paginated View issue

I use mail merge to merge data from Zoho CRM to a Zoho Writer document. It's been working totally fine for months and now I have started receiving this message after selecting the template:

Unable generate paginated view. Switching to fixed width view.

If I click ok the formatting of tables in the document go all out of alignment and there's no way of successfully reformatting.

Why has this happened and how can the problem be rectified.
Thanks